[llvm] [CI][Github] Version pin packages in windows container (PR #148319)

[Aiden Grossman via llvm-commits]

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@@ -39,11 +39,13 @@ RUN regsvr32 /S "C:\BuildTools\DIA SDK\bin\amd64\msdia140.dll" & \
 
 # install tools as described in https://llvm.org/docs/GettingStartedVS.html
 # and a few more that were not documented...
-RUN choco install -y ninja git sccache
 # Pin an older version of Python; the current Python 3.10 fails when
 # doing "pip install" for the other dependencies, as it fails to find libxml
 # while compiling some package.
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boomanaiden154 wrote:

We're still pinning to an older version of python though (for that reason). At some point we need to bump the python version and figure out why it fails to install, but for now it's stuck at `3.9.7`.

https://github.com/llvm/llvm-project/pull/148319