* General cleanup of the integration tests Golang code. Move the
`e2e.go` codebase into its own package and separate files.
* Reduce the overall log spam from the integration tests output.
* Add final GitHub workflow step that stops GARM server, and does the
GitHub cleanup of any orphaned resources.
* Add `TODO` to implement cleanup of the orphaned GitHub webhooks.
This is useful, if the uninstall of the webhooks failed.
* Add `TODO` for extra missing checks on the GitHub webhooks
install / uninstall logic.
Signed-off-by: Ionut Balutoiu <ibalutoiu@cloudbasesolutions.com>
