feat: add ignored-types option to avoid-late-keyword

[incendial]

What is the purpose of this pull request? (put an "X" next to an item)

• [ ] Documentation update
• [ ] Bug fix
• [ ] New rule
• [X] Changes an existing rule
• [ ] Add autofixing to a rule
• [ ] Add a CLI option
• [ ] Add something to the core
• [ ] Other, please explain:

1007

[codecov[bot]]

Codecov Report

Merging #1146 (63a926b) into master (d58a3f1) will increase coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1146      +/-   ##
==========================================
+ Coverage   85.55%   85.57%   +0.01%     
==========================================
  Files         350      350              
  Lines        7878     7888      +10     
==========================================
+ Hits         6740     6750      +10     
  Misses       1138     1138              

Impacted Files	Coverage Δ
...st/avoid_late_keyword/avoid_late_keyword_rule.dart	100.00% <100.00%> (ø)
...s/rules_list/avoid_late_keyword/config_parser.dart	100.00% <100.00%> (ø)
...r/rules/rules_list/avoid_late_keyword/visitor.dart	100.00% <100.00%> (ø)

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