117616: Fixed unique-decorators rule to work across multiple files

Also moved the logic to filter out unwanted decorators to the ESLint's selector and fixed a typo

docs/lint/ts/rules/themed-component-classes.md

@@ -34,7 +34,7 @@ class Something {
   selector: 'ds-base-test-themable',
   standalone: true,
 })
-class TestThemeableTomponent {
+class TestThemeableComponent {
 }
 ```
     
@@ -50,7 +50,7 @@ Filename: `lint/test/fixture/src/app/test/themed-test-themeable.component.ts`
     TestThemeableComponent,
   ],
 })
-class ThemedTestThemeableTomponent extends ThemedComponent<TestThemeableComponent> {
+class ThemedTestThemeableComponent extends ThemedComponent<TestThemeableComponent> {
 }
 ```