Add a URL sample to schema integration tests

Author: brizental

glean/tests/integration/schema/metrics.yaml

@@ -156,3 +156,16 @@ for_testing:
     send_in_pings:
       - testing
     unit: sample
+  url:
+    type: url
+    description: |
+      Sample url metric.
+    bugs:
+      - https://bugzilla.mozilla.org/000000
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=000000#c3
+    notification_emails:
+      - me@mozilla.com
+    expires: never
+    send_in_pings:
+      - testing

glean/tests/integration/schema/schema.spec.ts

@@ -110,6 +110,7 @@ describe("schema", function() {
     metrics.string.set("let's go");
     metrics.timespan.setRawNanos(10 * 10**6);
     metrics.uuid.generateAndSet();
+    metrics.url.set("glean://test");
     /* eslint-enable @typescript-eslint/no-unsafe-call, @typescript-eslint/no-unsafe-member-access */
 
     // Set up the http client to catch the ping we will submit.