When running `./blender/build_files/build_environment/install_deps.sh` on Ubuntu 20.04.3 LTS the following error can be seen:
```
./blender/build_files/build_environment/install_deps.sh: line 1266: [: too many arguments
```
This error results from the call:
```
check_package_version_ge_DEB $CLANG_FORMAT $CLANG_FORMAT_VERSION
```
with `CLANG_FORMAT_VERSION` being undefined.
Also as `clang-format` 13 is already released and hopefully didn't break anything `CLANG_FORMAT_VERSION_MEX` could use version bump.
Reviewed By: mont29
Differential Revision: https://developer.blender.org/D13924
b22db23aee