Merge duplicate logic of NoSuchProcess detection

[Jongy]

We have 2 different implementations that detect a "NoSuchProcess" state when reading ELF files of processes -

granulate-utils/granulate_utils/linux/elf.py

Line 24 in ddd5f79

def raise_nosuchprocess(func: Callable[P, R]) -> Callable[P, R]:

and

granulate-utils/granulate_utils/linux/process.py

Line 122 in ddd5f79

def translate_proc_errors(process: psutil.Process) -> Generator[None, None, None]:

.

Personally I prefer the latter, and it seems more complete. Let's remove either and fix all sites to use a single one.