[in synopsysctl] Clarify which inputs are absolutely required for deploying Polaris

[yashbhutwala]

What would you like to be added:
Make it clear to the "deployer of Polaris" which fields are required to deploy. This includes conditional requirements, for example if postgres container is used, only postgres-password is required. if postgres container is not used, postgres-host, postgres-port, postgres-username, and postgres-password are required.

Why is this needed:
Better user experience.

[mphammer]

One way we could start to do this is by adding more examples to the --help that show the flags that go together.

[yashbhutwala]

Good idea! 😄 Added an example in #1107. While better than nothing, this is still just a workaround, need to find a better way to build our own template with cobra similar to kubectl to group options together and mark group requirements 😄