run-make-support: add wrapper for fs operations

[Oneirical]

Suggested by #125728.

The point of this wrapper is to stop silent fails caused by forgetting to unwrap fs functions. However, functions like fs::read which return something and get stored in a variable should cause a failure on their own if they are not unwrapped (as the Result will be stored in the variable, and something will be done on that Result that should have been done to its contents). Is it still pertinent to wrap fs::read_to_string, fs::metadata and so on?

Closes: #125728

try-job: x86_64-msvc
try-job: i686-mingw