refactor: Clang-tidy fixes for files relevant to TDFA determinization.

[SharafMohamed]

References

• Depends on refactor: Create accepting NFA states using RAII. #84 .
• To review in parallel with PR#84, diff against PR#84 locally. In the repo run:

git fetch upstream pull/84/head:pr-84
git fetch upstream pull/85/head:pr-85
git diff pr-84 pr-85

Description

• Cleanup for the following files:
  • src/log_surgeon/Lexer.hpp
  • src/log_surgeon/LexicalRule.hpp
  • src/log_surgeon/SchemaParser.cpp
  • src/log_surgeon/finite_automata/DfaStatePair.hpp
  • src/log_surgeon/finite_automata/Nfa.hpp
  • src/log_surgeon/finite_automata/NfaState.hpp
  • tests/test-register-handler.cpp

Validation performed

• Existing tests pass.