2025-April-28 - 2.7.14993

Cleanup PR 12958 (rename GameStep.isXxxStep to isXxxStepName) (#13324)

Besides adding some @NonNls for stepNames mainly GameStep.java static methods renamed:
isAirborneCombatMoveStep
isBattleStep
isBidPlaceStep
isBidStep
isCombatMoveStep
isCombatMoveStep
isEndTurnStep
isMoveStep
isNonCombatMoveStep
isPlaceStep
isPoliticsStep
isPurchaseOrBidStep
isPurchaseStep
isTechActivationStep
isTechStep
isUserActionsStep