Fixed false positive `MISSING_KDOC_ON_FUNCTION` on local function (function inside another function)

[diphtongue]

What's done:

• Fixed false positive MISSING_KDOC_ON_FUNCTION on local function (function inside another function)
• Added warning test

Closes #1773

[codecov[bot]]

Codecov Report

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

Comparison is base (5511527) 78.43% compared to head (325134d) 78.45%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1848 +/- ## ============================================ + Coverage 78.43% 78.45% +0.02% - Complexity 2434 2439 +5 ============================================ Files 133 133 Lines 8616 8624 +8 Branches 2171 2174 +3 ============================================ + Hits 6758 6766 +8 Misses 896 896 Partials 962 962 ```

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JUnit Tests (Windows, EnricoMi/publish-unit-test-result-action@v2)

   164 files  ±0     164 suites  ±0   7m 29s :stopwatch: -11s 1 406 tests +4  1 389 :heavy_check_mark: +4  17 :zzz: ±0  0 :x: ±0  2 785 runs  +4  2 768 :heavy_check_mark: +4  17 :zzz: ±0  0 :x: ±0 

Results for commit 325134d6. ± Comparison against base commit 55115278.

:recycle: This comment has been updated with latest results.

[github-actions[bot]]

JUnit Tests (macOS, EnricoMi/publish-unit-test-result-action@v2)

   164 files  ±0     164 suites  ±0   10m 52s :stopwatch: + 4m 50s 1 406 tests +4  1 370 :heavy_check_mark: +4  36 :zzz: ±0  0 :x: ±0  2 785 runs  +4  2 749 :heavy_check_mark: +4  36 :zzz: ±0  0 :x: ±0 

Results for commit 325134d6. ± Comparison against base commit 55115278.

:recycle: This comment has been updated with latest results.