Bug 1583353 - Add mochitest-browser-chrome-thunderbird and mozmill to chunked test blacklist r=egao

Differential Revision: https://phabricator.services.mozilla.com/D56847

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

taskcluster/taskgraph/transforms/tests.py

@@ -1282,6 +1282,7 @@ CHUNK_SUITES_BLACKLIST = (
     'mochitest-a11y',
     'mochitest-browser-chrome',
     'mochitest-browser-chrome-screenshots',
+    'mochitest-browser-chrome-thunderbird',
     'mochitest-chrome',
     'mochitest-devtools-webreplay',
     'mochitest-plain',
@@ -1292,6 +1293,7 @@ CHUNK_SUITES_BLACKLIST = (
     'mochitest-webgl1-ext',
     'mochitest-webgl2-core',
     'mochitest-webgl2-ext',
+    'mozmill',
     'raptor',
     'reftest',
     'reftest-gpu',