Fix variable hiding issues in Builder methods and test classes

[ic0ns]

Summary

• Fixed 32 instances of variable hiding identified by static analysis
• Changed parameter names in ExtendedPatternLayout.Builder methods to avoid shadowing instance fields
• Updated local variable names in test classes to prevent hiding of test fixture fields

Changes Made

ExtendedPatternLayout.java

• Changed parameter names in all Builder setter methods:
  • pattern → patternValue
  • patternSelector → selector
  • configuration → config
  • regexReplacement → replacement
  • charset → charsetValue
  • alwaysWriteExceptions → writeExceptions
  • disableAnsi → disable
  • noConsoleNoAnsi → noAnsi
  • header → headerValue
  • footer → footerValue
• Updated all corresponding Javadoc @param annotations

ExtendedPatternLayoutTest.java

• Renamed local variable layout to testLayout in 3 test methods to avoid hiding the instance field

ModifiableBigIntegerTest.java

• Renamed local variables integer1 and integer2 to testInteger1 and testInteger2 in 4 test methods to avoid hiding instance fields

Test Plan

• All existing tests pass
• Code compiles without warnings
• Spotless formatting applied successfully