In 2.10 we will be using a strict API for forkliftController global settings.
Up until 2.10, we did not formally document the API of setting feature gates and other global settings.

https://kubev2v.github.io/forklift-documentation/documentation/doc-Migration_Toolkit_for_Virtualization/master/index.html#configuring-mtv-operator_forklift

in 2.10 we will formally declare the API for this options:
https://github.com/kubev2v/forklift/blob/main/operator/config/crd/bases/forklift.konveyor.io_forkliftcontrollers.yaml#L45

This PR includes all the settings, some short descriptions, and default values.

As @myakove raised the issue that we in 2.9 users may have used the API wrong because it was not formalized

We will need a release note informing users the API type for feature flags will only allow strings, e.g. "true" / "false" and error on booleans, in 2.9, we did not specify the type, and both booleans and strings were accepted.

• Release note: informing user that the API type for feature flags will only allow strings, e.g. "true" / "false" and error on booleans

• Add admonition note to the documentation: This note is important in case users use automation or scripts that use the API using the wrong type.