Allow static build of HiGHS with HiPO without specifying BLAS #5665

Job	Run time
debug64_all_tests (macos-latest)	41m 57s
release (macos-latest)	19m 22s
Release64 (macos-latest)	32m 10s
release_all_tests (macos-latest)	26m 39s
debug64 (macos-latest)	31m 43s
debug (macos-latest)	19m 24s
Release64_all_tests (macos-latest)	31m 21s
debug_all_tests (macos-latest)	49m 18s
	4h 11m 54s

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