ci: cache Ninja for Windows runners

[JohelEGP]

Installing Ninja takes ~2 min. and the run ~10 min.

[mpusz]

I am unable to find a solution that works. It also seems that is a known issue: https://github.com/chocolatey/choco/issues/2015.

[ivanstepanovftw]

Same here. Install: 1m30s

Run choco install ninja
  choco install ninja
  ninja --version
  command -v ninja
  shell: C:\Program Files\PowerShell\7\pwsh.EXE -command ". '{0}'"
Chocolatey v0.10.15

Install w/ caching C:\ProgramData\chocolatey\lib\ninja is 1m20s, and ninja --version is not recognized as command in powershell...