Add new ingress option to Google Cloud Functions

[upodroid]

Fixes: hashicorp/terraform-provider-google#7249

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)

cloudfunctions: added the ALLOW_INTERNAL_AND_GCLB option to `ingress_settings` of `google_cloudfunctions_function` resource.

[modular-magician]

Hello! I am a robot who works on Magic Modules PRs.

I have detected that you are a community contributor, so your PR will be assigned to someone with a commit-bit on this repo for initial review.

Thanks for your contribution! A human will be with you soon.

@ndmckinley, please review this PR or find an appropriate assignee.

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 1 file changed, 5 insertions(+), 13 deletions(-))
Terraform Beta: Diff ( 1 file changed, 5 insertions(+), 13 deletions(-))

[nat-henderson]

Why move all these values? It doesn't seem like this is a change from the previous behavior.

[upodroid]

I changed it the because those constants aren't doing much. Other resources don't do this

[nat-henderson]

Looks good to me - can you also change the doc in third_party/terraform/website to add this value to the list of options?

[upodroid]

Done

[modular-magician]

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

Diff report:

Terraform GA: Diff ( 2 files changed, 6 insertions(+), 14 deletions(-))
Terraform Beta: Diff ( 2 files changed, 6 insertions(+), 14 deletions(-))