tc_build: kernel: Silence new ruff warning (SIM115)

This is the same warning that we already disable for pylint, for the
reasons outlined in the comment block above this.

  tc_build/kernel.py:82:33: SIM115 Use a context manager for opening files
     |
  80 |             # always cleaned up.
  81 |             # pylint: disable-next=consider-using-with
  82 |             kconfig_allconfig = NamedTemporaryFile(dir=self.folders.build)
     |                                 ^^^^^^^^^^^^^^^^^^ SIM115
  83 |
  84 |             configs_to_disable = ['DRM_WERROR', 'WERROR']
     |

  Found 1 error.

Signed-off-by: Nathan Chancellor <[email protected]>

tc_build/kernel.py

@@ -79,7 +79,7 @@ def build(self):
             # try: ... finally: ... statement to ensure that this file is
             # always cleaned up.
             # pylint: disable-next=consider-using-with
-            kconfig_allconfig = NamedTemporaryFile(dir=self.folders.build)
+            kconfig_allconfig = NamedTemporaryFile(dir=self.folders.build)  # noqa: SIM115
 
             configs_to_disable = ['DRM_WERROR', 'WERROR']
             kconfig_allconfig_text = ''.join(f"CONFIG_{val}=n\n"