Bug 1648192 - Add mochitest-media to TSan test set. r=ahal

Depends on D94289

Differential Revision: https://phabricator.services.mozilla.com/D94290

taskcluster/ci/test/test-sets.yml

@@ -562,5 +562,6 @@ android-hw-arm7-browsertime:
     - browsertime-unity-webgl-mobile
 
 linux-tsan-tests:
+    - mochitest-media
     - mochitest-plain
     - xpcshell