Less restrictions for AWS NLB health check config

[kishorj]

What type of PR is this?

/kind cleanup
What this PR does / why we need it:
This PR removes the restrictions on NLB healthcheck interval, healthy and unhealthy thresholds. This is to ensure that all newly created target groups can take advantage of the improved health check functionality of the AWS NLB target groups.
Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:
After this change, it will be up to the end user to configure appropriate values for the annotations.

Does this PR introduce a user-facing change?:

Users will now be able to configure all supported values for AWS NLB health check interval and thresholds for new resources.

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

@kishorj: This issue is currently awaiting triage.

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[k8s-ci-robot]

Hi @kishorj. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[kishorj]

/assign m00nf1sh

[M00nF1sh]

/ok-to-test
/lgtm

[M00nF1sh]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, M00nF1sh

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• staging/src/k8s.io/legacy-cloud-providers/aws/OWNERS [M00nF1sh]

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