Combine all try workflows (#30096)

There are currently two ways to run try. One is to push to the `try` or
`try-*` branches and the other is to trigger a workflow via GitHub
comment. This change combines these methods into one workflow. In
addition, WPT results are reported together rather than separately and
filtered results for all WPT tests are bundled together in the same
artifact.

.github/workflows/mac.yml

@@ -31,8 +31,6 @@ on:
         required: false
         default: false
         type: boolean
-  push:
-    branches: ["try-mac", "try-wpt-mac", "try-wpt-mac-2020"]
 
 env:
   RUST_BACKTRACE: 1
@@ -73,7 +71,7 @@ jobs:
       - name: Script tests
         run: ./mach test-scripts
       - name: Unit tests
-        if: ${{ inputs.unit-tests || github.ref_name == 'try-mac' }}
+        if: ${{ inputs.unit-tests }}
         run: python3 ./mach test-unit --release
       - name: Package
         run: python3 ./mach package --release
@@ -111,7 +109,7 @@ jobs:
           path: target.tar.gz
 
   wpt-2020:
-    if: ${{ github.ref_name == 'try-wpt-mac-2020' || inputs.wpt-layout == '2020' || inputs.wpt-layout == 'all' }}
+    if: ${{ inputs.wpt-layout == '2020' || inputs.wpt-layout == 'all' }}
     name: Mac WPT Tests 2020
     needs: ["build"]
     uses: ./.github/workflows/mac-wpt.yml
@@ -119,7 +117,7 @@ jobs:
       layout: "layout-2020"
 
   wpt-2013:
-    if: ${{ github.ref_name == 'try-wpt-mac' || inputs.wpt-layout == '2013' || inputs.wpt-layout == 'all' }}
+    if: ${{ inputs.wpt-layout == '2013' || inputs.wpt-layout == 'all' }}
     name: Mac WPT Tests 2013
     needs: ["build"]
     uses: ./.github/workflows/mac-wpt.yml