bug: Allow disabling the http service and metrics with helm

[vihangm]

Description

Gating the OPENFGA_HTTP_ENABLED and OPENFGA_METRICS_ENABLED blocks means that when the value is set to false, the env vars are not set. This causes the deployment to use the default values for these configs which is Enabled: true. Instead we should do the same thing as we do in the OPENFGA_PLAYGROUND_ENABLED env var and always set it so that these can be disabled by helm users.

References

N/A

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[jeremy-albuixech]

that makes sense, thanks for the contribution!