Add `$macc_v2` #1675

Job	Run time
pre_docs_job	7s
pre_job	4s
Try build docs (html)	1m 10s
Reusable build (ubuntu-latest)	15m 56s
Try build docs (latexpdf)	1m 1s
Reusable build (macos-latest)	8m 1s
Run tests (ubuntu-latest)	53s
Run tests (macos-latest)	1m 26s
Run docs tests (ubuntu-latest)	40s
	29m 18s

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