[perf] Speed up CodeQuality rules with cheap guards before type resolution, reflection and subtree walks

[TomasVotruba]

Performance refactor of 7 rules. No behavior change - all fixtures pass unchanged.

Each rule ran an expensive op (type resolution, reflection, or a node-finder subtree walk) before a cheap check that can bail first:

• ThrowWithPreviousExceptionRector - isFirstClassCallable() now runs before resolveExceptionArgumentPosition() (reflection).
• RepeatedOrEqualToInArrayRector - the Equal node walk is now done lazily inside the $identicals !== [] branch (its only use), so an expression with no Identical skips it.
• RepeatedAndNotEqualToNotInArrayRector - same, the NotEqual walk is done only when $notIdenticals is non-empty.
• SimplifyEmptyCheckOnEmptyArrayRector - the allowed-expression instanceof check now runs before $scope->getType().
• IssetOnPropertyObjectToPropertyExistsRector - the ArrayDimFetch bail now runs before shouldSkipForPropertyTypeDeclaration() and matchPropertyTypeClassReflection() (reflection + getType).
• TernaryEmptyArrayArrayDimFetchToCoalesceRector - the areNodesEqual() comparison now runs before getType().
• InlineIsAInstanceOfRector - the second argument shape (Variable / ClassConstFetch) is checked before isFirstObjectType() (getType).

Reordering is safe: all moved checks are side-effect-free bail conditions, and each lazily-computed value is used only in the branch it was moved into.