Expose QR solvers from Eigen #1237

Job	Run time
ubuntu-latest - Python 3.8 Release	2m 6s
ubuntu-latest - Python 3.12 Release	2m 26s
ubuntu-latest - Python 3.8 Debug	3m 46s
ubuntu-latest - Python 3.12 Debug	3m 52s
ubuntu-latest - Python 3.8 Release -mavx2	2m 10s
ubuntu-latest - Python 3.12 Release -mavx2	2m 13s
ubuntu-latest - Python 3.8 Debug -mavx2	3m 50s
ubuntu-latest - Python 3.12 Debug -mavx2	3m 56s
macos-latest - Python 3.8 Release	2m 13s
macos-latest - Python 3.12 Release	3m 14s
macos-latest - Python 3.8 Debug	5m 41s
macos-latest - Python 3.12 Debug	8m 27s
macos-14 - Python 3.8 Release	2m 55s
macos-14 - Python 3.12 Release	7m 22s
macos-14 - Python 3.8 Debug	14m 29s
macos-14 - Python 3.12 Debug	7m 46s
check-macos-linux-conda	1s
	1h 16m 27s

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