Define CLANG_FORMAT_VERSION in install_deps.sh

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

build_files/build_environment/install_deps.sh

@@ -360,8 +360,9 @@ USE_CXX11=true
 # XXX_VERSION_SHORT is used for various things, like preferred version (when distribution provides several of them),
 #                   and to name shortcuts to built libraries' installation directories...
 
+CLANG_FORMAT_VERSION="10.0"
 CLANG_FORMAT_VERSION_MIN="6.0"
-CLANG_FORMAT_VERSION_MEX="10.0"
+CLANG_FORMAT_VERSION_MEX="14.0"
 
 PYTHON_VERSION="3.10.2"
 PYTHON_VERSION_SHORT="3.10"