Revert "put LinearAlgebra and SparseArrays in extensions (#841)" #2502

Job	Run time
Julia 1.10 - ubuntu-latest - x64	15m 37s
Julia 1.10 - macOS-latest - x64	15m 31s
Julia 1.10 - windows-latest - x64	16m 46s
Julia 1 - ubuntu-latest - x64	24m 22s
Julia 1 - macOS-latest - x64	20m 13s
Julia 1 - windows-latest - x64	24m 40s
Julia nightly - ubuntu-latest - x64	25m 25s
	2h 22m 34s

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