ci: Fix coverage workflow (#1373)

The coverage workflow has been failing since boring was added as a
dependency.

This change updates the coverage workflow to include the proper build
dependencies and splits the build and test running phases into distinct
steps.

The tests are now run daily instead of weekly so we can more readily
detect and recover from regressions.

Author: olix0r

.github/workflows/coverage.yml

@@ -1,9 +1,10 @@
 name: Coverage
 
-# Run weekly on Sunday at midnight (UTC).
+# Run daily at 11AM UTC (3AM PST).
 on:
   schedule:
-    - cron: '0 0 * * 0'
+    # cron: minute hour day month day-of-week
+    - cron: '0 11 * * *'
 
 env:
   CARGO_INCREMENTAL: 0
@@ -23,7 +24,9 @@ jobs:
       image: docker://rust:1.56.0-buster
       options: --security-opt seccomp=unconfined # 🤷
     steps:
+      - run: apt update && apt install -y cmake clang golang # for boring
       - uses: actions/checkout@ec3a7ce113134d7a93b817d10a8272cb61118579
       - run: cargo install cargo-tarpaulin
-      - run: cargo tarpaulin --verbose --workspace --out Xml
+      - run: cargo tarpaulin --verbose --workspace --no-run
+      - run: cargo tarpaulin --verbose --workspace --out Xml --ignore-tests --no-fail-fast
       - uses: codecov/codecov-action@f32b3a3741e1053eb607407145bc9619351dc93b