test(angular): remove ng14 and ng15 test apps

.github/workflows/build.yml

@@ -140,7 +140,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        apps: [ng14, ng15, ng16, ng17]
+        apps: [ng16, ng17]
     needs: [build-angular, build-angular-server]
     runs-on: ubuntu-latest
     steps:

packages/angular/test/README.md

@@ -8,7 +8,7 @@ The Angular test app supports syncing your locally built changes for validation.
 
 1. Build the `core` and `packages/angular` directories using `npm run build`.
 2. [Build the Angular test app](#test-app-build-structure).
-3. Navigate to the built test app directory (e.g. `packages/angular/test/build/ng14`).
+3. Navigate to the built test app directory (e.g. `packages/angular/test/build/ng17`).
 4. Install dependencies using `npm install`.
 5. Sync your local changes using `npm run sync`.
 
@@ -56,15 +56,15 @@ Unlike other test applications, these test apps are broken up into multiple dire
 Usage:
 
 ```shell
-# Build a test app using apps/ng14 as a reference
-./build.sh ng14
+# Build a test app using apps/ng17 as a reference
+./build.sh ng17
 ```
 
 ## How to modify test apps
 
 To add new tests, components, or pages, modify the `base` project. This ensures that tests are run for every tested version.
 
-If you want to add a version-specific change, add the change inside of the appropriate projects in `apps`. Be sure to replicate the directory structure. For example, if you are adding a new E2E test file called `test.spec.ts` in `apps/ng14`, make sure you place the file in `apps/ng14/e2e/src/test.spec.ts`.
+If you want to add a version-specific change, add the change inside of the appropriate projects in `apps`. Be sure to replicate the directory structure. For example, if you are adding a new E2E test file called `test.spec.ts` in `apps/ng17`, make sure you place the file in `apps/ng17/e2e/src/test.spec.ts`.
 
 ### Version-specific tests