Bug 1689162 - Update to Glean metrics schema v2. r=Dexter,firefox-build-system-reviewers,nalexander DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D138537

python/mach/metrics.yaml

@@ -8,7 +8,7 @@
 # Adding a new metric? We have docs for that!
 # https://mozilla.github.io/glean/book/user/metrics/adding-new-metrics.html
 ---
-$schema: moz://mozilla.org/schemas/glean/metrics/1-0-0
+$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
 
 mach:
   command:

python/mach/pings.yaml

@@ -5,7 +5,7 @@
 # If this file is changed, update the generated docs:
 # https://firefox-source-docs.mozilla.org/mach/telemetry.html#updating-generated-metrics-docs
 ---
-$schema: moz://mozilla.org/schemas/glean/pings/1-0-0
+$schema: moz://mozilla.org/schemas/glean/pings/2-0-0
 
 usage:
   description: >