Bug 1841926 - Make about:home startup cache probes permanent now that its shipped by default. data-review=jhirsch,r=amy

Differential Revision: https://phabricator.services.mozilla.com/D183298

toolkit/components/telemetry/Histograms.json

@@ -8953,9 +8953,9 @@
     "products": ["firefox"],
     "alert_emails": ["mconley@mozilla.com"],
     "bug_numbers": [
-      1622263, 1683101, 1714258, 1730042, 1754641, 1781978, 1811151
+      1622263, 1683101, 1714258, 1730042, 1754641, 1781978, 1811151, 1841926
     ],
-    "expires_in_version": "118",
+    "expires_in_version": "never",
     "kind": "exponential",
     "high": 10000,
     "n_buckets": 100,

toolkit/components/telemetry/Scalars.yaml

@@ -861,6 +861,7 @@ browser.startup:
       - 1754641
       - 1781978
       - 1811151
+      - 1841926
     description: >
       How the about:home startup cache functioned on startup.
 
@@ -875,7 +876,7 @@ browser.startup:
       8: User did not load about:home on its own by default.
       9: Cache is disabled because about:newtab preloading is disabled.
 
-    expires: "118"
+    expires: never
     kind: uint
     notification_emails:
       - mconley@mozilla.com
@@ -896,11 +897,12 @@ browser.startup:
       - 1754641
       - 1781978
       - 1811151
+      - 1841926
     description: >
       True if the about:home startup cache was written via the AsyncShutdown
       blocker.
 
-    expires: "118"
+    expires: never
     kind: boolean
     notification_emails:
       - mconley@mozilla.com