Bug 1585726 - Run mozlint on macosx64 and win64 too; r=ahal

Differential Revision: https://phabricator.services.mozilla.com/D82200

taskcluster/ci/source-test/python.yml

@@ -190,7 +190,16 @@ mozlint:
         subsuite: mozlint
     fetches:
         toolchain:
+            by-platform:
+                linux1804-64/opt:
                     - linux64-clang-tidy
+                    - linux64-node
+                macosx1014-64/opt:
+                    - macosx64-clang-tidy
+                    - macosx64-node
+                windows10-64/opt:
+                    - win64-clang-tidy
+                    - win64-node
     when:
         files-changed:
             - 'python/mozlint/**'

tools/lint/test/python.ini

@@ -3,7 +3,6 @@ subsuite = mozlint
 skip-if = python == 2
 
 [test_eslint.py]
-skip-if = os == "win" || os == "mac"  # node not installed on worker
 [test_flake8.py]
 requirements = tools/lint/python/flake8_requirements.txt
 skip-if = os == "mac"  # pip unable to find 'flake8==3.5.0'