[clang] [AArch64][SME] Add diagnostics for SME attributes on lambda functions (PR #121777)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-cmake-x86_64-avx512-linux` running on `avx512-intel64` while building `clang` at step 12 "setup lit".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/133/builds/9473

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 12 (setup lit) failure: '/localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/sandbox/bin/python /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/lnt/setup.py ...' (failure)
...

        See https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for details.
        ********************************************************************************

!!
  self.initialize_options()
zip_safe flag not set; analyzing archive contents...
Adding python-gnupg 0.3.7 to easy-install.pth file
detected new path './pytz-2016.10-py3.9.egg'

Installed /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/sandbox/lib64/python3.9/site-packages/python_gnupg-0.3.7-py3.9.egg
Searching for itsdangerous==0.24
Reading https://pypi.org/simple/itsdangerous/
Downloading https://files.pythonhosted.org/packages/dc/b4/a60bcdba945c00f6d608d8975131ab3f25b22f2bcfe1dab221165194b2d4/itsdangerous-0.24.tar.gz#sha256=cbb3fcf8d3e33df861709ecaf89d9e6629cff0a217bc2848f1b41cd30d360519
Best match: itsdangerous 0.24
Processing itsdangerous-0.24.tar.gz
Writing /tmp/easy_install-ga32lss_/itsdangerous-0.24/setup.cfg
Running itsdangerous-0.24/setup.py -q bdist_egg --dist-dir /tmp/easy_install-ga32lss_/itsdangerous-0.24/egg-dist-tmp-6f5fns26
warning: no previously-included files matching '*' found under directory 'docs/_build'
/localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/sandbox/lib/python3.9/site-packages/setuptools/_distutils/cmd.py:66: SetuptoolsDeprecationWarning: setup.py install is deprecated.
!!

        ********************************************************************************
        Please avoid running ``setup.py`` directly.
        Instead, use pypa/build, pypa/installer or other
        standards-based tools.

        See https://blog.ganssle.io/articles/2021/10/setup-py-deprecated.html for details.
        ********************************************************************************

!!
  self.initialize_options()
Adding itsdangerous 0.24 to easy-install.pth file
detected new path './python_gnupg-0.3.7-py3.9.egg'

Installed /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/sandbox/lib64/python3.9/site-packages/itsdangerous-0.24-py3.9.egg
Searching for Werkzeug==0.15.6
Reading https://pypi.org/simple/Werkzeug/
Downloading https://files.pythonhosted.org/packages/b7/61/c0a1adf9ad80db012ed7191af98fa05faa95fa09eceb71bb6fa8b66e6a43/Werkzeug-0.15.6-py2.py3-none-any.whl#sha256=00d32beac38fcd48d329566f80d39f10ec2ed994efbecfb8dd4b320062d05902
Best match: Werkzeug 0.15.6
Processing Werkzeug-0.15.6-py2.py3-none-any.whl
Installing Werkzeug-0.15.6-py2.py3-none-any.whl to /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/sandbox/lib64/python3.9/site-packages
Adding Werkzeug 0.15.6 to easy-install.pth file
detected new path './itsdangerous-0.24-py3.9.egg'

Installed /localdisk2/buildbot/llvm-worker/clang-cmake-x86_64-avx512-linux/test/sandbox/lib64/python3.9/site-packages/Werkzeug-0.15.6-py3.9.egg
Searching for SQLAlchemy==1.2.19
Reading https://pypi.org/simple/SQLAlchemy/
Downloading https://files.pythonhosted.org/packages/f9/67/d07cf7ac7e6dd0bc55ba62816753f86d7c558107104ca915e730c9ec2512/SQLAlchemy-1.2.19.tar.gz#sha256=5bb2c4fc2bcc3447ad45716c66581eab982c007dcf925482498d8733f86f17c7
error: [Errno 104] Connection reset by peer

```

</details>

https://github.com/llvm/llvm-project/pull/121777