Docs: Add health check annotations for AWS.

[longwuyuan]

What this PR does / why we need it:

• Discovered first hand on a call that the healthcheck annotations for AWS are absolute requirement but not documented
• Hence adding the important annotations in this PR

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• CVE Report (Scanner found CVE and adding report)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation only

Which issue/s this PR fixes

• No issue created as its docs improvement for missing info on AWS use

How Has This Been Tested?

• Tested live on a user's cluster on jitsi call

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I've read the CONTRIBUTION guide
• I have added unit and/or e2e tests to cover my changes.
• All new and existing tests passed.

/triage accepted
/kind documentation
/area docs

cc @Gacko @strongjz @rikatz @tao12345666333 kindly review/approve

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[Gacko]

/triage accepted
/kind documentation
/priority backlog
/hold

[Gacko]

/cherry-pick release-1.11

[k8s-infra-cherrypick-robot]

@Gacko: once the present PR merges, I will cherry-pick it on top of release-1.11 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.11

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[Gacko]

/cherry-pick release-1.10

[k8s-infra-cherrypick-robot]

@Gacko: once the present PR merges, I will cherry-pick it on top of release-1.10 in a new PR and assign it to you.

In response to this:

/cherry-pick release-1.10

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[Gacko]

I can not remember needing to add the health check annotations for target type instance. So I assume this only applies for IP mode.

[Gacko]

/unhold
/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Gacko, longwuyuan

The full list of commands accepted by this bot can be found here.

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Needs approval from an approver in each of these files:

• docs/OWNERS [Gacko,longwuyuan]

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[k8s-infra-cherrypick-robot]

@Gacko: new pull request created: #12020

In response to this:

/cherry-pick release-1.11

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[k8s-infra-cherrypick-robot]

@Gacko: new pull request created: #12021

In response to this:

/cherry-pick release-1.10

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.