Support virtual path in DiktatProcessor

[nulls]

What's done:

• support virtual path

It's part of #1817

[codecov]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (b3cd098) 78.40% compared to head (16bb770) 78.35%.

Files	Patch %	Lines
...urtool/diktat/ktlint/DiktatProcessorFactoryImpl.kt	0.00%	9 Missing ⚠️
...otlin/com/saveourtool/diktat/ktlint/KtLintUtils.kt	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1874      +/-   ##
============================================
- Coverage     78.40%   78.35%   -0.06%     
  Complexity     2465     2465              
============================================
  Files           134      134              
  Lines          8697     8703       +6     
  Branches       2200     2203       +3     
============================================
  Hits           6819     6819              
- Misses          899      905       +6     
  Partials        979      979              

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[github-actions]

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

   166 files  ±0     166 suites  ±0   5m 5s ⏱️ - 3m 56s
1 426 tests ±0  1 388 ✔️ ±0  38 💤 ±0  0 ❌ ±0 
2 805 runs  ±0  2 767 ✔️ ±0  38 💤 ±0  0 ❌ ±0 

Results for commit 16bb770. ± Comparison against base commit b3cd098.

[github-actions]

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

   166 files  ±0     166 suites  ±0   7m 11s ⏱️ -11s
1 426 tests ±0  1 409 ✔️ ±0  17 💤 ±0  0 ❌ ±0 
2 805 runs  ±0  2 788 ✔️ ±0  17 💤 ±0  0 ❌ ±0 

Results for commit 16bb770. ± Comparison against base commit b3cd098.