Replace test usages of DigestHashFunction#getDefaultUnchecked and implicit DigestHashFunction#getDefault calls by the actual default hash function. Also remove a bunch of unnecessary Clock injections.

PiperOrigin-RevId: 330572846
diff --git a/src/test/java/com/google/devtools/build/lib/runtime/BlazeRuntimeTest.java b/src/test/java/com/google/devtools/build/lib/runtime/BlazeRuntimeTest.java
index df5beb6..2688270 100644
--- a/src/test/java/com/google/devtools/build/lib/runtime/BlazeRuntimeTest.java
+++ b/src/test/java/com/google/devtools/build/lib/runtime/BlazeRuntimeTest.java
@@ -26,6 +26,7 @@
 import com.google.devtools.build.lib.server.FailureDetails.Crash.Code;
 import com.google.devtools.build.lib.server.FailureDetails.FailureDetail;
 import com.google.devtools.build.lib.util.DetailedExitCode;
+import com.google.devtools.build.lib.vfs.DigestHashFunction;
 import com.google.devtools.build.lib.vfs.FileSystem;
 import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
 import com.google.devtools.common.options.OptionsBase;
@@ -100,7 +101,7 @@
 
   @Test
   public void crashTest() throws Exception {
-    FileSystem fs = new InMemoryFileSystem();
+    FileSystem fs = new InMemoryFileSystem(DigestHashFunction.SHA256);
     ServerDirectories serverDirectories =
         new ServerDirectories(
             fs.getPath("/install"), fs.getPath("/output"), fs.getPath("/output_user"));
@@ -153,7 +154,7 @@
 
   @Test
   public void addsCommandsFromModules() throws Exception {
-    FileSystem fs = new InMemoryFileSystem();
+    FileSystem fs = new InMemoryFileSystem(DigestHashFunction.SHA256);
     ServerDirectories serverDirectories =
         new ServerDirectories(
             fs.getPath("/install"), fs.getPath("/output"), fs.getPath("/output_user"));