fix: conditionally set preserveSymlinks and add karma dependency

In `ng_config.bzl`, `preserveSymlinks` is now only set for test builders other than `@angular/build:unit-test`, preventing override issues.

The `karma` package is added as an explicit dependency in `ng_test.bzl` to ensure tests run correctly.

Author: alan-agius4

src/architect/ng_config.bzl

@@ -19,7 +19,11 @@ JQ_DIST_REPLACE_TSCONFIG = """
 JQ_DIST_REPLACE_ANGULAR = """
 (
   .projects | to_entries | map(
-    .value.architect.test.options.preserveSymlinks = true
+    if .value.architect.test.builder != "@angular/build:unit-test" then
+      .value.architect.test.options.preserveSymlinks = true
+    else
+      .
+    end
     |
     if .value.projectType == "application" then
       .value.architect.build.options.outputPath = "./" + .value.root + "/dist"

src/architect/ng_test.bzl

@@ -13,6 +13,7 @@ NPM_DEPS = lambda node_modules: ["/".join([node_modules, s]) for s in [
     "@types/jasmine",
     "@types/node",
     "jasmine-core",
+    "karma",
     "karma-chrome-launcher",
     "karma-coverage",
     "karma-jasmine",