Workaround build failure when building for jemalloc with ninja (#1474)

[blenderfreaky]

This fixes the issue described in #1474

Description

The CMake code causing the issue now checks whether it's using ninja. If it is, it manually escapes the $ that it fails to escape on its own.

Checklist

• Code compiles without errors locally
• All tests pass locally
• CI workflows execute properly

• CI workflows, not executed per PR (e.g. Nightly), execute properly

[bratpiorka]

@blenderfreaky UMF uses automatic code format checks, which are failing with your code. Note that the cmake-format package needs to be installed on your system

python -m pip install cmake-format==0.6.13

cmake --build build (...) -DUMF_FORMAT_CODE_STYLE=ON
cmake --build build --target cmake-format-apply

[blenderfreaky]

@bratpiorka thanks for the help! Rebased to fix the formatting issue

[lukaszstolarczuk]

thank you!