Bug 1578058 - TC: Create a new lint/rust category r=ahal

Depends on D58252

Differential Revision: https://phabricator.services.mozilla.com/D58267

--HG--
extra : moz-landing-system : lando

taskcluster/ci/config.yml

@@ -141,6 +141,7 @@ treeherder:
         'js': 'JavaScript checks'
         'py': 'Python checks'
         'java': 'Java checks'
+        'rust': 'Rust checks'
         'Static-Analysis': 'Full tree static-analysis'
         'SS': 'Shadow scheduler'
         'test-info': 'Test manifest skip/fail information'

taskcluster/ci/source-test/mozlint.yml

@@ -268,7 +268,7 @@ l10n-conflicts:
 rustfmt:
     description: rustfmt on the Rust code
     treeherder:
-        symbol: misc(rustfmt)
+        symbol: rust(rustfmt)
     run:
         mach: lint -v -l rustfmt -f treeherder -f json:/builds/worker/mozlint.json *
     when:
@@ -279,7 +279,7 @@ rustfmt:
 clippy:
     description: clippy on the Rust code
     treeherder:
-        symbol: misc(clippy)
+        symbol: rust(clippy)
     run:
         mach: lint -v -l clippy -f treeherder -f json:/builds/worker/mozlint.json
     when: