fix(@angular/build): maintain media output hashing with vitest unit-testing

To ensure that output media files do not overwrite each other if source
media files use the same base file name but are contained in different
directories, the output hashing option from the build target will now keep
the `media` option enabled if configured.

(cherry picked from commit f806f64)

Author: clydin

packages/angular/build/src/builders/unit-test/builder.ts

@@ -36,6 +36,17 @@ export type { UnitTestBuilderOptions };
 
 type VitestCoverageOption = Exclude<import('vitest/node').InlineConfig['coverage'], undefined>;
 
+function adjustOutputHashing(hashing?: OutputHashing): OutputHashing {
+  switch (hashing) {
+    case OutputHashing.All:
+    case OutputHashing.Media:
+      // Ensure media is continued to be hashed to avoid overwriting of output media files
+      return OutputHashing.Media;
+    default:
+      return OutputHashing.None;
+  }
+}
+
 /**
  * @experimental Direct usage of this function is considered experimental.
  */
@@ -135,7 +146,7 @@ export async function* execute(
     ssr: false,
     prerender: false,
     sourceMap: { scripts: true, vendor: false, styles: false },
-    outputHashing: OutputHashing.None,
+    outputHashing: adjustOutputHashing(buildTargetOptions.outputHashing),
     optimization: false,
     tsConfig: normalizedOptions.tsConfig,
     entryPoints,