Fixes #25102 - introduce template inputs

This adds the formal template inputs to all templates. It's heavily
based on current implementation from remote execution plugin.

Fixes #24259 - Add canned admin role

fixes #24935 - validate existence of proxy assocations

Fixes #24957 - correctly filter taxonomies in API

Fixes #19790 - Fix Layout/SpaceBeforeBlockBraces cop

Fixes #24348 - Validate compute resources is within taxonomy

Fixes #22611 - Adapt DB migrations for Rails 5.2

Fixes #24782 - Show hosts count in API

Signed-off-by: Boaz Shuster <boaz.shuster.github@gmail.com>

Fixes #24712 - Fix performance regression on API

This commit improves on the fix in 01809199 which has been found to
cause significant performance regressions. It also adds several other
improvements to the API scope performance, the most significant one...

Fixes #23979 - add option to search location & organization