chore: add C collation to postgres e2e and testcontainer

[lucaCambi77]

https://dhis2.atlassian.net/browse/DHIS2-15957

As discussed at the back meeting and agreed with @stian-sandvold, we are adding C collation as default to e2e and integration testing.

Note that:

• e2e test use docker-compose
• integration tests use the Java library TestContainer

The weird part here was that the Postgres docker image gets the locale from the OS, for example, en_US.utf-8 , however:

• in e2e tests it doesn't use it for some reason. Eventually, it falls back probably to using a C collate or similar.
• For integration tests, on the contrary, it gets and uses the proper locale.

C collation apparently is the best fit for dhis2. Note that this kind of collation is case-sensitive. So, for instance, A a B b will sort ascending A B a b.
Note also that this can impact ordering during testing. However, this might not be the case for instances because they might want to use a different collation. So the order in testing is arbitrary unless some type of order is required.
An alternative is to change the order collation at the query level

The same change will be applied to play instances when possible @Philip-Larsen-Donnelly

[codecov]

Codecov Report

Merging #15388 (062f25e) into master (51fb710) will increase coverage by 16.67%.
Report is 2 commits behind head on master.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             master   #15388       +/-   ##
=============================================
+ Coverage     49.48%   66.15%   +16.67%     
- Complexity    23291    31181     +7890     
=============================================
  Files          3489     3489               
  Lines        129699   129699               
  Branches      15136    15136               
=============================================
+ Hits          64176    85799    +21623     
+ Misses        59448    36807    -22641     
- Partials       6075     7093     +1018     

Flag	Coverage Δ
integration	49.72% <ø> (?)
integration-h2	32.40% <ø> (-0.02%)	⬇️
unit	30.37% <ø> (ø)

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see 1225 files with indirect coverage changes

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[sonarcloud]

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0.0% Coverage
0.0% Duplication