ci: check: use rustup instead of some actions

Setting up stable rust is easy. Let's not pretend that it is not.

Signed-off-by: Leonard Göhrs <l.goehrs@pengutronix.de>

Author: hnez

.github/workflows/check.yaml

@@ -19,27 +19,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: stable
-          components: rustfmt
-          override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
+      - run: rustup toolchain install stable
+      - run: rustup run stable cargo fmt --all -- --check
 
   clippy:
     name: cargo clippy
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: stable
-          components: clippy
-          override: true
-      - uses: actions-rs/cargo@v1
-        with:
-          command: clippy
+      - run: rustup toolchain install stable
+      - run: rustup run stable cargo clippy --all