Add scheduled test to Actions for all features

Add a new job to the Rust workflow to run 'cargo build' and 'cargo
test' (on the cron schedule only) with the '--all-features' flag.
This will execute across all three environments: Linux, macOS,
Windows.

Autoformat the Rust workflow file via the Red Hat YAML extension for
Visual Studio Code:
https://marketplace.visualstudio.com/items?itemName=redhat.vscode-yaml
This straightens out whitespace and string quoting for safer parsing.

Fixes #3506.

.github/workflows/rust.yml

@@ -4,7 +4,7 @@ on:
   workflow_dispatch:
   schedule:
     # Everyday at 5:00am
-    - cron: '0 5 * * *'
+    - cron: "0 5 * * *"
   pull_request:
   push:
     # trying and staging branches are for Bors config
@@ -78,6 +78,33 @@ jobs:
           command: test
           args: --locked --release --all
 
+  test-all-features:
+    name: Tests all features on ${{ matrix.os }} on cron schedule only
+
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-18.04, macos-12, windows-2022]
+
+    if: github.event_name == 'schedule'
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Run cargo build with all features
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --workspace --locked --release --all-features
+
+      - name: Run cargo test with all features
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --workspace --locked --release --all-features
+
   # We run tests in debug also, to make sure that the debug_assertions are hit
   test-debug:
     name: Run tests in debug