Bug 1729635 - Create a bug template for devtools regressions (#7265)

* Bug 1729635 - Add bug template for devtools

Fix linter

* Bug 1729635 - Add devtools-perf-regression tag

treeherder/perf/fixtures/performance_bug_templates.yaml

@@ -117,4 +117,19 @@
 
       Details of the alert can be found in the [alert summary]({{ alertHref }}), including links to graphs and comparisons for each of the affected tests. Please follow our [guide to handling regression bugs](https://wiki.mozilla.org/TestEngineering/Performance/Handling_regression_bugs) and **let us know your plans within 3 business days, or the offending patch(es) will be backed out** in accordance with our [regression policy](https://www.mozilla.org/en-US/about/governance/policies/regressions/).
 
+      For more information on performance sheriffing please see our [FAQ](https://wiki.mozilla.org/TestEngineering/Performance/FAQ).
+- model: perf.PerformanceBugTemplate
+  pk: 10
+  fields:
+    framework: 12
+    keywords: perf, perf-alert, regression, devtools-perf-regression
+    default_component: General
+    default_product: DevTools
+    text: |
+      Perfherder has detected a {{ framework }} performance regression from push [{{ revision }}]({{ revisionHref }}). As author of one of the patches included in that push, we need your help to address this regression.
+
+      {{ alertSummary }}
+
+      Details of the alert can be found in the [alert summary]({{ alertHref }}), including links to graphs and comparisons for each of the affected tests. Please follow our [guide to handling regression bugs](https://wiki.mozilla.org/TestEngineering/Performance/Handling_regression_bugs) and **let us know your plans within 3 business days, or the offending patch(es) will be backed out** in accordance with our [regression policy](https://www.mozilla.org/en-US/about/governance/policies/regressions/).
+
       For more information on performance sheriffing please see our [FAQ](https://wiki.mozilla.org/TestEngineering/Performance/FAQ).