[CLI]Update Integrate patch release

[jhnstn]

This adds the ability to integrate patch release into the main apps.

It adds a host version flag (-V) to the release integrate command.

It will also fail if the trying to integrate a patch where the host version is not supplied.

NOTE: This will work for beta fixes but might not work for hot fixes where the release branch no longer exists. Issue to handle hotfixes https://github.com/wordpress-mobile/release-toolkit-gutenberg-mobile/issues/239

Testing

Follow the Testing guide to set up the tool to use forked repos.

Note: A patch PR is required on the forked Gutenberg Mobile repo before attempting the patch integration. This can be manually created to avoid requiring a Gutenberg patch PR

• Create a release branch on the forked host apps e.g. release/1.0
• Create a patch release PR on the Gutenberg Mobile fork
• Run the integration command with the GBM patch version
• Notice the failure message requiring a host version for an patch integration
• Run the integration command again but now include the host version e.g. -V 1.0
• The script should open a PR against the release branch