Add full support for parallelization backends #452

Job	Run time
Run Tests (Julia min - ubuntu-latest)	12m 27s
Run Tests (Julia min - windows-latest)	15m 44s
Run Tests (Julia min - macos-14)	11m 34s
Run Tests (Julia 1 - ubuntu-latest)	15m 34s
Run Tests (Julia 1 - windows-latest)	17m 40s
Run Tests (Julia 1 - macos-14)	10m 52s
	1h 23m 51s

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