Bug 1602863 - migrate crashtest, mochitest, mochitest-gpu, xpcshelltest to run under linux1804-64 r=jmaher

Changes:

Remove `crashtest`, `mochitest-gpu`, `mochitest` and `xpcshelltest` from running with ubuntu1604.

Enable the above tests to run with ubuntu1804 image under `linux1804-64` label.

Differential Revision: https://phabricator.services.mozilla.com/D58464

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

taskcluster/ci/test/test-sets.yml

@@ -337,15 +337,12 @@ awsy-stylo-sequential:
 # Limited test sets for specific platforms
 
 linux-common-tests:
-    - cppunit
-    - crashtest
     - firefox-ui-functional-local
     - firefox-ui-functional-remote
     - gtest
     - jittest
     - jsreftest
     - marionette
-    - mochitest
     - mochitest-a11y
     - mochitest-browser-chrome
     - mochitest-chrome
@@ -361,12 +358,15 @@ linux-common-tests:
     - test-verify
     - test-verify-gpu
     - test-verify-wpt
-    - xpcshell
 
-# List of tests that are green on ubuntu1804 doker image.
+# List of tests that are green on ubuntu1804 docker image.
 # See Bug 1602863 for information.
 linux1804-tests:
     - cppunit
+    - crashtest
+    - mochitest
+    - mochitest-gpu
+    - xpcshell
 
 linux-qr-tests:
     - cppunit

tools/tryselect/test/test_fuzzy.py

@@ -13,7 +13,7 @@ import pytest
 @pytest.mark.skipif(os.name == 'nt', reason="fzf not installed on host")
 def test_paths(run_mach, capfd):
     cmd = ['try', 'fuzzy', '--no-push',
-           '-q', "'linux64/opt-xpcshell", 'caps/tests/unit/test_origin.js']
+           '-q', "'linux1804-64/opt-xpcshell", 'caps/tests/unit/test_origin.js']
     assert run_mach(cmd) == 0
 
     output = capfd.readouterr().out
@@ -23,7 +23,7 @@ def test_paths(run_mach, capfd):
     # with the path filtering.
     expected = """
     "tasks": [
-        "test-linux64/opt-xpcshell-e10s-1"
+        "test-linux1804-64/opt-xpcshell-e10s-1"
     ]""".lstrip()
 
     assert expected in output