Add support for output to an absolute path

[GiudGiud]

Reason

The file-base is appended to the current directory path. This makes it awkward when outputting to another disk, which naturally requires a lot of '../' to back out from the current directory

Design

A new parameter to outputs next to file_base

Impact

User support

Discussed in #29840

^{Originally posted by HPL001 February 7, 2025}

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Question

Hello, I run Moose from the command line with the following command. Mine uses WSL mode to install (installed on disk D) and run Moose. I now want to save the output file to another disk (J disk), how should I modify my command?
mpiexec -n 88 ./combined-opt -i Fe_iso.i Outputs/file_base='./datas/Fe/01/out'

[GiudGiud]

Tied to #4181
it used to return an error. now it just does not work seemingly