tipi build and toolchain isolation

[daminetreg]

Currently tipi remote build are perfectly reproducible and isolated as an environment is created for them, however for local builds our CMake toolchains are not always correct in selecting only tipi provided tooling.

At the moment we have the following known issues :

• Ensure the right compiler is used currently on windows if a clang.exe is available it will find this one.

  • (https://cmake.org/cmake/help/latest/command/find_program.html, step 2 is looking in the CMAKE_PREFIX_PATH and the 5th is looking in the system PATH variables only, )

• On macos the standard libary from the system might be taken instead of the libc++ clang provided one.

As soon as we solve that we can also generalize the build cache for local use.