test_runner: extend reporterColorMap for diagnostic levels

Enhanced  to include colors for the following
diagnostic levels:
 : blue
 : gray
 : yellow
 : red

Ensures consistency in color-coding across the reporter.

Refs: nodejs#55922

lib/internal/test_runner/reporter/utils.js

@@ -37,6 +37,18 @@ const reporterColorMap = {
   get 'test:diagnostic'() {
     return colors.blue;
   },
+  get 'info'() {
+    return colors.blue;
+  },
+  get 'debug'() {
+    return colors.gray;
+  },
+  get 'warn'() {
+    return colors.yellow;
+  },
+  get 'error'() {
+    return colors.red;
+  },
 };
 
 function indent(nesting) {