const ENABLE_VTL2_GPA_POOL: &str = "OPENHCL_ENABLE_VTL2_GPA_POOL=";Expand description
Test-legacy/test-compat override for OPENHCL_IGVM_VTL2_GPA_POOL_CONFIG.
(otherwise, tests cannot modify the VTL2 GPA pool config different from what
may be in the manifest).