refactor(platform-browser-dynamic): keep preserveWhitespaces default setting in one place (#18772)

CompilerConfig should be the only source of default settings for preserveWhitespaces
so let's not enforce defaults on the CompilerOptions level.

PR Close #18772

packages/platform-browser-dynamic/src/compiler_factory.ts

@@ -161,7 +161,6 @@ export class JitCompilerFactory implements CompilerFactory {
       defaultEncapsulation: ViewEncapsulation.Emulated,
       missingTranslation: MissingTranslationStrategy.Warning,
       enableLegacyTemplate: true,
-      preserveWhitespaces: true,
     };
 
     this._defaultOptions = [compilerOptions, ...defaultOptions];