Small changes related to VersionSpecificWorkerContextWrapper and new tests

[codeforgreen]

Related to #6505

What was done:

• updated all implementors of IValidationSupport to use Logs.getTerminologyTroubleshootingLog()
• added a bunch of new tests on VersionSpecificWorkerContextWrapper related to the cache and also testing the methods to fetch validation resources at different levels (unit and integration).

Note that the initial scope of this PR was changed and it now does not include any functional change.

[github-actions]

Formatting check succeeded!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.18%. Comparing base (406db33) to head (0f8ddcc).
Report is 137 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6506      +/-   ##
============================================
- Coverage     83.54%   83.18%   -0.36%     
- Complexity    27432    28183     +751     
============================================
  Files          1707     1779      +72     
  Lines        106185   110130    +3945     
  Branches      13397    13848     +451     
============================================
+ Hits          88710    91614    +2904     
- Misses        11750    12546     +796     
- Partials       5725     5970     +245     

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[jamesagnew]

FYI @codeforgreen I believe this PR should be redundant once this merges (it also fixes the same issue by just never expiring StructureDefinions): #6508

[codeforgreen]

FYI @codeforgreen I believe this PR should be redundant once this merges (it also fixes the same issue by just never expiring StructureDefinions): #6508

I updated the scope of this PR to much smaller. I updated the description accordingly. It now just include the small compile warning or refactoring changes and additional tests. There is no change to the caches or validato, no changelog in this PR.