tests: fix duplicate parametrization rejected by pytest 9.1.0 (#2227)

Backport of #2212, scoped down to the cuda_bindings/tests/test_nvfatbin.py
portion that applies to 12.9.x. The cuda_core/tests/test_utils.py portion
of #2212 (the trailing-comma-in-parametrize-name fix) does not apply here
because the 12.9.x version of that test file does not have the bug — its
parametrize uses two names matching tuple values.

What is fixed (verbatim from #2212):

  cuda_bindings/tests/test_nvfatbin.py had two tests using
  @pytest.mark.parametrize("arch", ["sm_80"], indirect=True) to override
  the fixture-level `arch` parametrization. pytest 9.1.0 now rejects this
  combination as "duplicate parametrization of 'arch'". Extract the
  CUBIN-building logic into a _build_cubin(arch) helper, drop the indirect
  override on the two tests, and call the helper inline with the
  hardcoded "sm_80" they need. Preserves intent (the override existed
  because target arch "75" must not match the CUBIN's arch).

Closes #2226. Hunk body verified identical to the corresponding hunk in
#2212 (commit a9156b6).

Author: leofang

cuda_bindings/tests/test_nvfatbin.py

@@ -122,8 +122,7 @@ def nvcc_smoke(tmpdir) -> str:
     return nvcc
 
 
-@pytest.fixture
-def CUBIN(arch):
+def _build_cubin(arch):
     def CHECK_NVRTC(err):
         if err != nvrtc.nvrtcResult.NVRTC_SUCCESS:
             raise RuntimeError(repr(err))
@@ -142,6 +141,11 @@ def CHECK_NVRTC(err):
     return cubin
 
 
+@pytest.fixture
+def CUBIN(arch):
+    return _build_cubin(arch)
+
+
 # create a valid LTOIR input for testing
 @pytest.fixture
 def LTOIR(arch):
@@ -261,11 +265,11 @@ def test_nvfatbin_add_ptx(PTX, arch):
     nvfatbin.destroy(handle)
 
 
-@pytest.mark.parametrize("arch", ["sm_80"], indirect=True)
-def test_nvfatbin_add_cubin_ELF_SIZE_MISMATCH(CUBIN, arch):
+def test_nvfatbin_add_cubin_ELF_SIZE_MISMATCH():
+    cubin = _build_cubin("sm_80")
     handle = nvfatbin.create([], 0)
     with pytest.raises(nvfatbin.nvFatbinError, match="ERROR_ELF_ARCH_MISMATCH"):
-        nvfatbin.add_cubin(handle, CUBIN, len(CUBIN), "75", "inc")
+        nvfatbin.add_cubin(handle, cubin, len(cubin), "75", "inc")
 
     nvfatbin.destroy(handle)
 
@@ -282,11 +286,11 @@ def test_nvfatbin_add_cubin(CUBIN, arch):
     nvfatbin.destroy(handle)
 
 
-@pytest.mark.parametrize("arch", ["sm_80"], indirect=True)
-def test_nvfatbin_add_cubin_ELF_ARCH_MISMATCH(CUBIN, arch):
+def test_nvfatbin_add_cubin_ELF_ARCH_MISMATCH():
+    cubin = _build_cubin("sm_80")
     handle = nvfatbin.create([], 0)
     with pytest.raises(nvfatbin.nvFatbinError, match="ERROR_ELF_ARCH_MISMATCH"):
-        nvfatbin.add_cubin(handle, CUBIN, len(CUBIN), "75", "inc")
+        nvfatbin.add_cubin(handle, cubin, len(cubin), "75", "inc")
 
     nvfatbin.destroy(handle)