cheev_ is producing wrong results with C_LAPACK=ON

[AGonzales-amd]

Related issue: #5562

Version: v0.3.31 and develop branch
Host: Ubuntu 24.04
OpenBLAS configure command: cmake -GNinja -B build -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DC_LAPACK=ON -DTARGET=HASWELL -DDYNAMIC_ARCH=ON -DBUILD_TESTING=OFF

cheev_ produces the wrong results when C_LAPACK=ON is set. The result is correct otherwise.

• Expected result (w/o C_LAPACK): W={ 361.063, 381.069, 385.608, 393.389, 398.056, 405.462, 409.183, 415.139, 416.88, 422.932, 427.312, 460.909 }
• Actual result (C_LAPACK=ON): W={ -1320.84, -1304.57, -1263.61, -1163.4, -1031.98, -979.717, 326.446, 379.353, 409.357, 447.614, 465.384, 806.674 }

Build reproducer:

1. g++ test_heev_dynamic_alloc.cpp -L<path/to/openblas/lib> -lopenblas -o test_heev_dynamic_alloc
2. ./test_heev_dynamic_alloc

test_heev_dynamic_alloc.cpp

[martin-frbg]

Looks like the compiler is optimizing out the CDOTC result in chetd2.c - all is good if I put a printf there :(