Update comments in values.yaml to be picked up by helm-docs

Issue

When helm-docs is used to generate the README.md, it looks for a particular pattern when deciding which comments in the values are included and which are not. Currently, almost all of the comments in keycloak's default values.yaml are not formatted correctly and the generated README.md is missing a significant amount of documentation as a result.

Acceptance Criteria

• Every value that gets pulled into the README.md when generated must be generated with accompanying documentation