Consolidate linalg and VI tests

[kshyatt]

Fixes to the caching for CI runs and some Enzyme improvements have cut the runtime of Enzyme tests substantially, so we can probably fold these back into smaller files to reduce the amount of CI runs.

[lkdvos]

Suggested change

	rTαs = if α === Zero()
	(Const,)
	elseif !is_ci
	(Active, Const)
	else
	(Active,)
	end
	rTαs = []
	α === Zero() || push!(rTαs, Active)
	(α === Zero() || !is_ci) && push!(rTαs, Const)

Just a small suggestion for code style, I tend to find it a bit easier to see what is going on if there aren't too many lines

[Jutho]

I don't quite like that this is now changed just here in this one instance, while the test file is full of these constructs. I don't mind the three case separation and keeping rTαs a tuple (though clearly that doesn't have any real advantages here). I would suggest to revert it to the previous state, unless @lkdvos feels strongly, but then they should probably be changed everywhere

[lkdvos]

I kind of meant to change it everywhere but got pulled into a meeting midway through my suggestions 😁

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
see 6 files with indirect coverage changes

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