Fix PETSc build issue when using cmake 4

[andrsd]

Closes #761

[andrsd]

This is a potential way how to fix #761. This locally patches PETSc sources so it can build metis and parmetis with cmake 4. I found an issue in PETSc issue tracker where the user ran into the same problem 9 months ago and the advice given was to use --download-cmake. That flag gets cmake=3 and all builds. I am not sure if PETSc installs cmake. If so then having multiple cmakes is not a godd thing IMO. If not, then we could patch the dependencies cmake script to use --download-cmake which should fix the issue for future users as well.

Do you guys have preference how to patch this?