improve configurability of probes

[pb82]

Description

Makes readiness and liveness probes more configurable and also adds an option to set the scheme.

Relevant issues/tickets

#635

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• This change requires a documentation update
• I have added tests that prove my fix is effective or that my feature works
• I have added a test case that will be used to verify my changes
• Verified independently on a cluster by reviewer

Verification steps

1. Deploy the operator
2. Create a Grafana CR and override the readiness and liveness probes to set their scheme to https

[vmanley]

Verified as per steps provided on CRC

[NissesSenap]

You need to perform make test or you can run make bundle-kustomization. It will update the changes that is breaking the pr.
But always good to run make test since it includes a number of other commands as well that makes sure that all files is up to date.

[NissesSenap]

LGTM