Bug 1696031 - [ci] fission-webgl-ipc: Enable 'mochitest-webgl2-core' on more platforms, r=jmaher

This enables the following tasks on central:
+test-linux1804-64-asan-qr/opt-mochitest-webgl2-core-fis-gli-e10s
+test-linux1804-64-qr/debug-mochitest-webgl2-core-fis-gli-e10s
+test-linux1804-64-shippable-qr/opt-mochitest-webgl2-core-fis-gli-e10s
+test-windows10-64-qr/debug-mochitest-webgl2-core-fis-gli-e10s
+test-windows10-64-shippable-qr/opt-mochitest-webgl2-core-fis-gli-e10s

and the following tasks on autoland:
+test-linux1804-64-asan-qr/opt-mochitest-webgl2-core-fis-gli-e10s
+test-linux1804-64-qr/debug-mochitest-webgl2-core-fis-gli-e10s
+test-linux1804-64-qr/opt-mochitest-webgl2-core-fis-gli-e10s
+test-windows10-64-qr/debug-mochitest-webgl2-core-fis-gli-e10s
+test-windows10-64-qr/opt-mochitest-webgl2-core-fis-gli-e10s

Depends on D117936

Differential Revision: https://phabricator.services.mozilla.com/D118054

taskcluster/ci/test/mochitest.yml

@@ -673,9 +673,9 @@ mochitest-webgl2-core:
         by-test-platform:
             .*-ccov.*/.*: []
             android.*: []
-            linux.*64-qr/debug: ['fission', 'webrender-sw', 'webgl-ipc', 'wayland']
-            linux.*64(-shippable)?(-asan)?-qr/opt: ['fission', 'webgl-ipc', 'wayland']
-            windows10-64(-shippable)?-qr/(opt|debug): ['fission', 'webgl-ipc']
+            linux.*64-qr/debug: ['fission', 'fission-webgl-ipc', 'webrender-sw', 'webgl-ipc', 'wayland']
+            linux.*64(-shippable)?(-asan)?-qr/opt: ['fission', 'fission-webgl-ipc', 'webgl-ipc', 'wayland']
+            windows10-64(-shippable)?-qr/(opt|debug): ['fission', 'fission-webgl-ipc', 'webgl-ipc']
             default: ['webgl-ipc']
     chunks:
         by-test-platform: