qmetadata file functions and subfuncs converted

[x] qmetadata functions and related subfunctions converted to fixed.
[x] Few functions are commented as some math functions changes are in progress.

Testing:
[x] With "ivas-codec-20231128_Update_Ittiam" as reference, prepare_pytest and run_pytest run through.
[x] The pytest results show as "242 failed, 334 passed, 373 skipped, 13 warnings, 84 errors".
For all the failed cases that were generated in param_file for DUT, MLD test was run through
after extracting mono channels from the files and resampled to 48000. The maximum loudness
difference was observed to be < 3 for all the failed cases.