refactor(compiler-cli): rename the BuiltinFn type to the more generic KnownFn (#35191)

This is in preparation of using the `KnownFn` type for known TypeScript
helpers (in addition to built-in functions/methods). This will in turn
allow simplifying the detection of both imported and emitted TypeScript
helpers.

PR Close #35191

packages/compiler-cli/src/ngtsc/partial_evaluator/index.ts

@@ -8,4 +8,4 @@
 
 export {DynamicValue} from './src/dynamic';
 export {ForeignFunctionResolver, PartialEvaluator} from './src/interface';
-export {BuiltinFn, EnumValue, ResolvedValue, ResolvedValueArray, ResolvedValueMap} from './src/result';
+export {EnumValue, KnownFn, ResolvedValue, ResolvedValueArray, ResolvedValueMap} from './src/result';