Relax C910V qemu utest timeout

[mpwaser]

Summary

This relaxes the C910V QEMU timeout for openblas_utest.

The timeout showed up while checking #5899, but #5899 only changed CMake/CTest registration. The failing C910V job uses the make build and runs openblas_utest directly under QEMU.

Details

The failing job repeatedly reaches:

TEST 126/128 fork:safety

and then restarts the whole unit-test binary with short timeout windows.

This keeps the existing retry defaults, but lets callers override them. Only the observed slow binary gets a larger budget:

run_with_retry "$QEMU_BIN ./utest/openblas_utest" 120 2 30
run_with_retry "$QEMU_BIN ./utest/openblas_utest_ext"

openblas_utest_ext keeps the default retry behavior because the observed timeout happens before it runs.

Scope

Limited to .github/workflows/c910v.yml.

Validation

Checked the relevant Actions history:

• PR Fix CTest command for openblas_utest_ext #5899 run 29003486034, job 86079876651: timed out at openblas_utest fork:safety.
• Post-merge develop run 29007407697, job 86082261750: same timeout pattern.
• Prior passing develop run 28967557753, job 85954497464: same test reached timeout retries before eventually passing.