Fixes #35088 - Remove GCE Compute resource code

All code related to GCE compute resource
is now in Foreman Google plugin

https://github.com/theforeman/foreman_google

Fixes #35301 - minitest 5 deprecation fixes

This possibly overlaps with _() as a translation method. value() is also
an alias that can be used but using the assert* methods is more
consistent with the rest of the codebase

Fixes #34526 - Switch Rails version to 6.1

Changes overview:
- Set default Rails version to 6.1
- Required dynfow >= 1.6.5
- Cleanup deprecation warnings in config/as_deprecation_whitelist.yaml
- ActiveSupport::ParameterFilter instead of ActionDispatch::Http::ParameterFilter...

Fixes #34346 - support Openstack URI with paths

The Keystone URI is processed before we pass it's base form to the fog.
If Keystone is deployed under a sub-uri e.g. /identity like Devstack
does, the path is always ommited. This preserves the path.

Fixes #31883 - Validate compute attributes before API creation

Fixes #30793 - Remove API v3 from fog-ovirt

Fixes #30552 - Fix vmware vm cloning when volumes are not present

Refs #31031 - no mixed hash keys

Disable mixing hash keys.
Exclude routes for now as those should be transfered consistantly.

Fixes #30175,#30195 - Moving Quota validation to before_save in Ovirt CR (#7774)

Co-authored-by: Shira Maximov <shiramaximov@gmail.com>

Fixes #28874 - set/get eager zero flag