[TRIVIAL] Ensure all sorting is ASCII-order consistently across platforms

[ximinez]

High Level Overview of Change

This change explicitly specifies LANG=C in the levelization script, which causes it to use plain ASCII ordering, and should cause the levelization results to be consistent across environments.

Context of Change

This is a follow up to the physical redesign PR #4997. The merge / migration instructions in that PR note:

Check the sort order in Builds/levelization/results/ordering.txt. [...] Different versions of sort have been inconsistent on this matter in my experience. [...]

The cause of this inconsistency is not the version of sort, but the language settings of the shell, which varies depending on local configuration.

Type of Change

• Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)

Before / After

Before:
On some machines, running ./Builds/levelization/levelization.sh will change the order of the results in ordering.txt.

After:
Running that script anywhere will give consistent results. Run against an unmodified develop branch, it should result in no changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.4%. Comparing base (8fc805d) to head (dc6fbe6).

Additional details and impacted files

@@           Coverage Diff           @@
##           develop   #5072   +/-   ##
=======================================
  Coverage     71.3%   71.4%           
=======================================
  Files          796     796           
  Lines        67039   67039           
  Branches     10868   10868           
=======================================
+ Hits         47832   47833    +1     
+ Misses       19207   19206    -1     

see 1 file with indirect coverage changes

[Bronek]

Thanks for fixing this !