- Using separate workflows for each build to work around the nested v…

…irtualisation issue

- Initiate Compile for 21.02-slim-bullseye image

Merge pull request #3 from Plattar/feature/enh-issue-2

Upgrade to release 22.05a

- Recompile Version of USD 21.02 to build usdGenSchema

- Added jinja2 Python plugin used for usdGenSchema

- Remove the include folder that is probably not being used by anything