Backport of When configured, use the health check of the proxy into release/1.0.x

[thisisnotashwin]

Backport

This PR is auto-generated from #1841 to be assessed for backporting due to the inclusion of the label backport/1.0.x.

The below text is copied from the body of the original PR.

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Changes proposed in this PR:

• When a service is configured with the correct annotation, a readiness endpoint with be configured in Consul dataplane, and the readiness probe of the sidecar will be configured to use that endpoint to determine the health of the system. Additionally, when t-proxy is enabled, that port shall be in the ExcludeList for inbound connections.

How I've tested this PR:

• By deploying zookeeper with and without this annotation and noticing the absence of the lack of the following exception.

EndOfStreamException: Unable to read additional data from client sessionid 0x0, likely client has closed socket
	at org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:239)
	at org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
	at java.lang.Thread.run(Thread.java:748)

• Unit tests
• Zookeeper deployment to test with: https://gist.github.com/thisisnotashwin/e81939e62225e61c37ac5e2e3423a7c8
  How I expect reviewers to test this PR:
• Code Review
• Does this require an acceptance test?

Checklist:

• Tests added
• CHANGELOG entry added

  HashiCorp engineers only, community PRs should not add a changelog entry.
  Entries should use present tense (e.g. Add support for...)

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Overview of commits

• f77b0e5 - 500a500