[MRG] Fix LOG_REQUEST_IDENTIFIERS not applying to Associaton send QR methods

[scaramallion]

Reference issue

Closes #911

Tasks

• [x] Unit tests added that reproduce issue or prove feature is working
• [x] Fix or feature added
• [x] Documentation and examples updated (if relevant)
• [x] Unit tests passing and coverage at 100% after adding fix/feature

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (20993be) to head (ec5cb0c). Report is 5 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #936 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 28 28 Lines 8703 8706 +3 ========================================= + Hits 8703 8706 +3 ``` | [Files](https://app.codecov.io/gh/pydicom/pynetdicom/pull/936?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pydicom) | Coverage Δ | | |---|---|---| | [pynetdicom/association.py](https://app.codecov.io/gh/pydicom/pynetdicom/pull/936?src=pr&el=tree&filepath=pynetdicom%2Fassociation.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pydicom#diff-cHluZXRkaWNvbS9hc3NvY2lhdGlvbi5weQ==) | `100.00% <100.00%> (ø)` | | | [pynetdicom/service\_class.py](https://app.codecov.io/gh/pydicom/pynetdicom/pull/936?src=pr&el=tree&filepath=pynetdicom%2Fservice_class.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=pydicom#diff-cHluZXRkaWNvbS9zZXJ2aWNlX2NsYXNzLnB5) | `100.00% <100.00%> (ø)` | |