Use API service health check for k8s deployments

[AlexeyPetroff]

Proposed changes

This pull request addresses an issue with the lowcoder deployment using the current Helm charts, where the api-service pod restarts due to the readiness probe returning a 404 NOT_FOUND error. The error occurs as follows:

2024-07-30 00:10:55.579 ERROR o.l.api.framework.exception.GlobalExceptionHandler#lambda$doLog$8:155 GET /actuator/health [parallel-1]: org.springframework.web.server.ResponseStatusException: 404 NOT_FOUND

To resolve this issue, this PR updates the readiness and liveness probes to use the health check endpoint as documented in the Lowcoder self-hosting setup guide.
This change ensures that the probes correctly check the health of the api-service and prevent unnecessary pod restarts.
Since health check endpoint was introduced in v2.4.1, previous lowcoder versions will not work.

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🔨 Latest commit	640522a

[AlexeyPetroff]

#999

[FalkWolsky]

Thank you very much Alexey! A while ago we (FINALLY) introduced this endpoint at the API for ... pretty much exactly this reason! Now step by step we need to update the deployment files to make use of. Your contribution is much welcome!