chore: don't use once_cell for 1.18.x LTS release (#5048)

The latest release of once_cell has an MSRV that is incompatible with the MSRV of the 1.18.x LTS release.

.github/workflows/ci.yml

@@ -10,9 +10,9 @@ env:
   RUSTFLAGS: -Dwarnings
   RUST_BACKTRACE: 1
   # Change to specific Rust release to pin
-  rust_stable: stable
+  rust_stable: 1.60.0
   rust_nightly: nightly-2022-03-21
-  rust_clippy: 1.52.0
+  rust_clippy: 1.56.0
   rust_min: 1.49.0
 
 defaults:
@@ -284,8 +284,9 @@ jobs:
           toolchain: ${{ env.rust_min }}
           override: true
       - uses: Swatinem/rust-cache@v1
-      - name: "test --workspace --all-features"
-        run: cargo check --workspace --all-features
+      - name: "test --all-features"
+        run: cargo check --all-features
+        working-directory: tokio
 
   minimal-versions:
     name: minimal-versions

.github/workflows/loom.yml

@@ -11,7 +11,7 @@ env:
   RUSTFLAGS: -Dwarnings
   RUST_BACKTRACE: 1
   # Change to specific Rust release to pin
-  rust_stable: stable
+  rust_stable: 1.60.0
 
 jobs:
   loom:

.github/workflows/stress-test.yml

@@ -9,7 +9,7 @@ env:
   RUSTFLAGS: -Dwarnings
   RUST_BACKTRACE: 1
   # Change to specific Rust release to pin
-  rust_stable: stable
+  rust_stable: 1.60.0
 
 jobs:
   stess-test: