refactor: replace nullable properties with lateinit for improved initialization in CommentResolver

[tangcent]

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[codecov]

Codecov Report

Attention: Patch coverage is 30.43478% with 16 lines in your changes missing coverage. Please review.

Project coverage is 63.113%. Comparing base (a020e49) to head (a04d36d).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ent/idea/plugin/api/export/core/CommentResolver.kt	30.435%	13 Missing and 3 partials ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##              master     #1178   +/-   ##
===========================================
  Coverage     63.113%   63.113%           
  Complexity      2398      2398           
===========================================
  Files            255       255           
  Lines          13273     13273           
  Branches        3033      3033           
===========================================
  Hits            8377      8377           
+ Misses          3302      3299    -3     
- Partials        1594      1597    +3     

Flag	Coverage Δ
unittests	63.113% <30.435%> (ø)

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

Files with missing lines	Coverage Δ
...ent/idea/plugin/api/export/core/CommentResolver.kt	32.203% <30.435%> (ø)

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