Terraform 7456 spanner database deletion protection

[melinath]

Fixes hashicorp/terraform-provider-google#7456.

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

spanner: added `deletion_protection` field to `google_spanner_database` to make deleting them require an explicit intent.

spanner: `google_spanner_database` resources now cannot be destroyed unless `deletion_protection = false` is set in state for the resource.

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 36 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 36 insertions(+), 2 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+))
Inspec: Diff ( 1 file changed, 1 insertion(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152382"

[modular-magician]

Oops! It looks like you're using an unknown release-note type in your changelog entries:

• REPLACEME

Please only use the types listed in https://github.com/GoogleCloudPlatform/magic-modules/blob/master/.ci/RELEASE_NOTES_GUIDE.md.

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 13 files changed, 55 insertions(+), 21 deletions(-))
Terraform Beta: Diff ( 13 files changed, 55 insertions(+), 21 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+))
Inspec: Diff ( 1 file changed, 1 insertion(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152568"

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 13 files changed, 55 insertions(+), 21 deletions(-))
Terraform Beta: Diff ( 13 files changed, 55 insertions(+), 21 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+))
Inspec: Diff ( 1 file changed, 1 insertion(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152568"

[modular-magician]

Oops! It looks like you're using an unknown release-note type in your changelog entries:

• REPLACEME

Please only use the types listed in https://github.com/GoogleCloudPlatform/magic-modules/blob/master/.ci/RELEASE_NOTES_GUIDE.md.

[modular-magician]

Oops! It looks like you're using an unknown release-note type in your changelog entries:

• REPLACEME

Please only use the types listed in https://github.com/GoogleCloudPlatform/magic-modules/blob/master/.ci/RELEASE_NOTES_GUIDE.md.

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 13 files changed, 111 insertions(+), 21 deletions(-))
Terraform Beta: Diff ( 13 files changed, 111 insertions(+), 21 deletions(-))
TF OiCS: Diff ( 1 file changed, 1 insertion(+))
Inspec: Diff ( 1 file changed, 1 insertion(+))

[modular-magician]

I have triggered VCR tests based on this PR's diffs. See the results here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152571"

[nat-henderson]

Awesome, glad you figured out the issue with GetOkExists. This must be the thirtieth time someone on our team has been surprised by that behavior.

[modular-magician]

I have triggered VCR tests in RECORDING mode for the following tests that failed during VCR: TestAccDataSourceSpannerInstance_basic|TestAccProviderMeta_setModuleName|TestAccBillingBudget_billingBudgetNotifyExample|TestAccRegionInstanceGroupManager_basic|TestAccRegionInstanceGroupManager_targetSizeZero|TestAccRegionInstanceGroupManager_versions|TestAccRegionInstanceGroupManager_autoHealingPolicies|TestAccRegionInstanceGroupManager_distributionPolicy|TestAccRegionInstanceGroupManager_update|TestAccComputeRegionHealthCheck_tcp_update|TestAccRegionInstanceGroupManager_stateful|TestAccComputeRouterPeer_basic|TestAccComputeRouterPeer_advertiseMode|TestAccComputeRouterInterface_withTunnel|TestAccComputeSnapshot_snapshotBasicExample|TestAccComputeSnapshot_encryption|TestAccComputeTargetInstance_targetInstanceBasicExample|TestAccComputeTargetInstance_targetInstanceCustomNetworkExample|TestAccComputeVpnGateway_targetVpnGatewayBasicExample|TestAccComputeVpnTunnel_vpnTunnelBasicExample|TestAccComputeVpnTunnel_vpnTunnelBetaExample|TestAccComputeVpnTunnel_regionFromGateway|TestAccComputeVpnTunnel_router|TestAccComputeVpnTunnel_defaultTrafficSelectors|TestAccContainerCluster_withNodeConfig|TestAccContainerCluster_withSandboxConfig|TestAccContainerNodePool_withSandboxConfig|TestAccDataprocCluster_updatable|TestAccDataprocCluster_withLifecycleConfigIdleDeleteTtl|TestAccDataprocCluster_withAutoscalingPolicy|TestAccDNSPolicy_dnsPolicyBasicExample|TestAccDNSPolicy_update|TestAccIapBrand_iapBrandExample|TestAccIapClient_iapClientExample|TestAccNetworkManagementConnectivityTest_networkManagementConnectivityTestInstancesExample|TestAccNotebooksInstance_notebookInstanceBasicExample|TestAccNotebooksInstance_notebookInstanceFullExample|TestAccNotebooksInstance_notebookInstanceBasicContainerExample|TestAccOSConfigGuestPolicies_osConfigGuestPoliciesBasicExample|TestAccOSConfigPatchDeployment_osConfigPatchDeploymentBasicExample|TestAccOSConfigPatchDeployment_osConfigPatchDeploymentInstanceExample|TestAccStorageBucketIamPolicy You can view the result here: "https://ci-oss.hashicorp.engineering/viewQueued.html?itemId=152581"