Adds the ability to change the OCM API URL based on the environment
variable `OCM_URL` allowing a user to change the OCM context without
changing global state on their machine.

These commands were missing the ConnectionBuilder abstraction and were
still building the connection manually, so these were migrated so that
they will work correctly.

Adds an explicit warning message in the login command that the OCM_URL
environment variable is explicitly NOT used for login.

Allows override URL but when running with the debug flag this will
inform users that this functionality is tech preview and may have issues
while we build and test this.

This should allow SRE to be able to use this feature immediately
following the next release while setting the expectation with customers
who may find this that it may still have some unexpected quirks, and to
fall back to supported methodology for using this tool.