Factorizing matrices with pypardiso is not a no-op

[marc-vdm]

Factorizing matrices with pypardiso is not a no-op and more importantly, can have substantial benefit to calculation speed.

While I don't mind warning users of potential limited benefit, I think it's not wise to outright deny users to factorize their A matrices through the below code.

brightway2-calc/bw2calc/lca_base.py

Lines 119 to 120 in adc379e

	if PYPARDISO:
	warnings.warn("PARDISO installed; this is a no-op")

See also haasad/PyPardiso#75 for further discussion.

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edit: Also see the Pardiso documentation on solver phases, A matrix decomposition is possible
https://www.intel.com/content/www/us/en/docs/onemkl/developer-reference-c/2024-1/pardiso.html#GUID-FB4D5442-2BE8-4687-A6F6-D2AAE34B8A87