Fix TextLocation of Indentation rule

[Yundin]

Although Indentation applies to the whole file, it's a local rule. Start of the real location reported by ktlint's offset. And I assume that the end location should be on first non-whitespace character.
This cause detekt plugin to highlight the whole file and html output to highlight everything to the end of snippet.

Relevant issue: detekt/detekt-intellij-plugin#131

[codecov]

Codecov Report

Merging #4030 (834492a) into main (a3ba379) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main    #4030      +/-   ##
============================================
+ Coverage     83.54%   83.57%   +0.02%     
- Complexity     3180     3186       +6     
============================================
  Files           459      459              
  Lines          9082     9097      +15     
  Branches       1770     1772       +2     
============================================
+ Hits           7588     7603      +15     
  Misses          561      561              
  Partials        933      933              

Impacted Files	Coverage Δ
...lab/arturbosch/detekt/formatting/FormattingRule.kt	97.67% <100.00%> (+0.05%)	⬆️
...turbosch/detekt/formatting/wrappers/Indentation.kt	100.00% <100.00%> (ø)
.../io/gitlab/arturbosch/detekt/api/ConfigProperty.kt	100.00% <0.00%> (ø)
...rturbosch/detekt/rules/empty/EmptyFunctionBlock.kt	93.33% <0.00%> (ø)
...sch/detekt/rules/naming/FunctionParameterNaming.kt	90.90% <0.00%> (ø)
...bosch/detekt/rules/complexity/LongParameterList.kt	87.75% <0.00%> (ø)
...h/detekt/rules/naming/MemberNameEqualsClassName.kt	84.21% <0.00%> (ø)
...tlab/arturbosch/detekt/rules/style/UseDataClass.kt	77.94% <0.00%> (+0.32%)	⬆️
...ules/documentation/LicenceHeaderLoaderExtension.kt	80.95% <0.00%> (+0.46%)	⬆️
...eptions/ThrowingExceptionsWithoutMessageOrCause.kt	91.66% <0.00%> (+0.75%)	⬆️
... and 2 more

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[schalkms]

Awesome 1st contribution! Thank you for that.
The code changes look fine to me. In my opinion, a test should be added in order to avoid this issue in the future.

[cortinico]

great stuff 🎉

[Yundin]

Great idea! I will add test for that