test(agc-driver): registered_workgroup_sync fails on main (expected preparation failure) #4204

agc_driver_prepared_shaders_registered_workgroup_sync fails on current main without any other change.

• main: 7a84b22 (Merge pull request fix(agc): report arena host holes as stored over on Windows #4131), clean checkout of upstream/main
• Windows 10, GCC (winlibs mingw64), Release, Ninja, NVIDIA RTX 4080 SUPER (Vulkan)
• ctest -R prepared_shaders_registered_workgroup: agc_driver_prepared_shaders_registered_workgroup passes; ..._registered_workgroup_sync (runs the same executable with --registered-workgroup and APS5_SYNC_SHADER_PREPARE=1) fails with the message expected preparation failure.
• That message comes from ExpectFailure in core/libs/prx/libSceAgcDriver/tests/execution/PreparedShaders.cpp: an action that the test expects to throw did not throw in synchronous-prepare mode. I did not narrow down which ExpectFailure call it is.

PR #4085 reports the same failure on RTX 4060 and lavapipe without its change, so it is not specific to one GPU. I opened this so that PRs touching the recompiler (e.g. #3952, where I disabled the changed code and got the same failure) are not blamed for it.

AI-assisted (Claude Code).