[Feature]: Keycloak TLS 1.2 support

[pmig]

Checklist

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Is this feature request related to a problem?

None

Problem Description

Although TLS 1.2 is already deprecated, some customers still need to maintain clients, that does only support TLS 1.2

Solution Description

We need to add an option for optionally passing TLS schemes in the CRD during start, so we can start Keycloak with an additional --https-protocols=<protocol>[,<protocol>] option.

For more information see: https://www.keycloak.org/server/enabletls

Benefits

Additional configuration options.

Potential Drawbacks

No response

Additional Information

We could also create a generic solution to allow a custom map or list of args.