Remove dtolnay's rust-toolchain action (#442)

* Remove dtolnay's rust-toolchain action

I believe our rust-toolchain.toml handles its use case exactly.

I don't believe this'll work, as it'd require rustup install a cargo stub
before any toolchain is installed, yet I want to confirm it doesn't.

* Place quotes around nightly toolchain version

* Put toolchain before options to resolve what appears to be a bug in rustup's help strings

* Add wasm32-unkknown-unknown to clippy workflow

.github/workflows/lint.yml

@@ -21,11 +21,12 @@ jobs:
         uses: ./.github/actions/build-dependencies
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          rust-toolchain: ${{ steps.nightly.outputs.version }}
-          rust-components: rust-src, clippy
+
+      - name: Install nightly rust
+        run: rustup toolchain install ${{ steps.nightly.outputs.version }} --profile minimal -t wasm32-unknown-unknown -c clippy
 
       - name: Run Clippy
-        run: cargo clippy --all-features --all-targets -- -D warnings -A clippy::items_after_test_module
+        run: cargo +${{ steps.nightly.outputs.version }} clippy --all-features --all-targets -- -D warnings -A clippy::items_after_test_module
 
   deny:
     runs-on: ubuntu-latest
@@ -38,11 +39,6 @@ jobs:
           path: ~/.cargo/advisory-db
           key: rust-advisory-db
 
-      - name: Install cargo
-        uses: dtolnay/rust-toolchain@5cb429dd810e16ff67df78472fa81cf760f4d1c0
-        with:
-          toolchain: 1.74.0
-
       - name: Install cargo deny
         run: cargo install --locked cargo-deny
 
@@ -58,11 +54,8 @@ jobs:
         id: nightly
         run: echo "version=$(cat .github/nightly-version)" >> $GITHUB_OUTPUT
 
-      - name: Install rustfmt
-        uses: dtolnay/rust-toolchain@5cb429dd810e16ff67df78472fa81cf760f4d1c0
-        with:
-          toolchain: ${{ steps.nightly.outputs.version }}
-          components: rustfmt
+      - name: Install nightly rust
+        run: rustup toolchain install ${{ steps.nightly.outputs.version }} --profile minimal -c rustfmt
 
       - name: Run rustfmt
         run: cargo +${{ steps.nightly.outputs.version }} fmt -- --check