Fix: 'permits' and 'sealed' Contextual keyworlds usage

[jlerbsc]

Fixes #4041

From java 17, the keywords 'permits' and 'sealed' cannot be used as type identifiers in the context of a NormalClassDeclaration or NormalInterfaceDeclaration.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.973%. Comparing base (4fb1298) to head (181fcd6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #4434   +/-   ##
=========================================
  Coverage   51.973%   51.973%           
=========================================
  Files          505       505           
  Lines        28453     28453           
  Branches      4929      4929           
=========================================
  Hits         14788     14788           
  Misses       11613     11613           
  Partials      2052      2052           

Flag	Coverage Δ
AlsoSlowTests	51.973% <100.000%> (ø)
javaparser-core	51.973% <100.000%> (ø)
javaparser-symbol-solver	51.973% <100.000%> (ø)
jdk-10	51.969% <100.000%> (ø)
jdk-11	51.969% <100.000%> (ø)
jdk-12	51.969% <100.000%> (ø)
jdk-13	51.969% <100.000%> (ø)
jdk-14	51.969% <100.000%> (ø)
jdk-15	51.969% <100.000%> (ø)
jdk-16	51.969% <100.000%> (ø)
jdk-17	51.969% <100.000%> (ø)
jdk-18	51.969% <100.000%> (ø)
jdk-8	51.968% <100.000%> (ø)
jdk-9	51.969% <100.000%> (ø)
macos-latest	51.962% <100.000%> (ø)
ubuntu-latest	51.966% <100.000%> (ø)
windows-latest	51.952% <100.000%> (ø)

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Files	Coverage Δ
...or/language_level_validations/Java17Validator.java	100.000% <100.000%> (ø)

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