Temporary removing K2 compiler Frontend

[orchestr7]

What's done:

• removed -Xuse-k2 option

[github-actions]

JUnit Tests (Windows, EnricoMi/publish-unit-test-result-action@v1)

   157 files     157 suites   8m 57s ⏱️
1 270 tests 1 254 ✔️ 15 💤 1 ❌
1 271 runs  1 255 ✔️ 15 💤 1 ❌

For more details on these failures, see this check.

Results for commit 6e1f876.

♻️ This comment has been updated with latest results.

[github-actions]

JUnit Tests (macOS, EnricoMi/publish-unit-test-result-action@v1)

1 270 tests   1 255 ✔️  10m 25s ⏱️
   157 suites       15 💤
   157 files           0 ❌

Results for commit 6e1f876.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

Merging #1405 (6e1f876) into master (5f77cad) will decrease coverage by 0.02%.
The diff coverage is 75.00%.

@@             Coverage Diff              @@
##             master    #1405      +/-   ##
============================================
- Coverage     83.40%   83.38%   -0.03%     
- Complexity     2538     2552      +14     
============================================
  Files           106      106              
  Lines          7623     7570      -53     
  Branches       2089     2086       -3     
============================================
- Hits           6358     6312      -46     
+ Misses          375      372       -3     
+ Partials        890      886       -4     

Flag	Coverage Δ
unittests	83.38% <75.00%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...n/kotlin/org/cqfn/diktat/ruleset/utils/PsiUtils.kt	57.14% <ø> (+0.89%)	⬆️
...iktat/ruleset/rules/chapter3/files/NewlinesRule.kt	81.08% <66.66%> (-0.11%)	⬇️
.../diktat/ruleset/rules/chapter2/kdoc/KdocMethods.kt	87.42% <100.00%> (-0.16%)	⬇️
.../cqfn/diktat/ruleset/rules/chapter5/CustomLabel.kt	85.71% <0.00%> (-7.15%)	⬇️
...n/org/cqfn/diktat/ruleset/utils/StringCaseUtils.kt	86.41% <0.00%> (-1.54%)	⬇️
.../kotlin/org/cqfn/diktat/plugin/maven/DiktatMojo.kt	90.90% <0.00%> (-1.40%)	⬇️
...org/cqfn/diktat/ruleset/rules/chapter3/SortRule.kt	88.65% <0.00%> (-1.04%)	⬇️
...t/ruleset/rules/chapter6/classes/SingleInitRule.kt	77.31% <0.00%> (-1.04%)	⬇️
...set/rules/chapter3/ClassLikeStructuresOrderRule.kt	91.66% <0.00%> (-1.00%)	⬇️
... and 41 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 5f77cad...6e1f876. Read the comment docs.