perf(no-unnecessary-type-arguments): use isTypeIdenticalTo + flags checks (#723)

AI wrote this when trying to find why a rule was so slow against my
company's internal codebase.
Before these changes 
<img width="890" height="661" alt="image"
src="https://github.com/user-attachments/assets/f1bfcd38-bb33-4515-8344-72e0d3fddd92"
/>

after

<img width="885" height="645" alt="image"
src="https://github.com/user-attachments/assets/e2851958-2a4a-47ad-88c5-9e2133fc3481"
/>

---------

Co-authored-by: Cameron <cameron.clark@hey.com>

Author: kalvenschraut

internal/rules/no_unnecessary_type_arguments/no_unnecessary_type_arguments.go

@@ -129,7 +129,7 @@ var NoUnnecessaryTypeArgumentsRule = rule.Rule{
 			if utils.IsIntrinsicErrorType(argType) {
 				return
 			}
-			if argType != paramType && (utils.IsTypeAnyType(argType) || utils.IsTypeAnyType(paramType) || !(checker.Checker_isTypeStrictSubtypeOf(ctx.TypeChecker, argType, paramType) && checker.Checker_isTypeStrictSubtypeOf(ctx.TypeChecker, paramType, argType))) {
+			if argType != paramType && (utils.IsTypeAnyType(argType) || utils.IsTypeAnyType(paramType) || (argType.Flags() != paramType.Flags()) || !checker.Checker_isTypeIdenticalTo(ctx.TypeChecker, argType, paramType)) {
 				return
 			}
 

shim/checker/extra-shim.json

@@ -31,7 +31,7 @@
       "getBaseTypeOfLiteralType",
       "getWidenedType",
       "isTypeAssignableTo",
-      "isTypeStrictSubtypeOf",
+      "isTypeIdenticalTo",
       "IsDeprecatedDeclaration",
       "GetShorthandAssignmentValueSymbol",
       "getImmediateAliasedSymbol",