Use rustup in build matrix workflows

Author: cptartur

.github/workflows/_build-binaries.yml

@@ -48,10 +48,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@7b1c307e0dcbda6122208f10795a713336a9b35a
-        with:
-          toolchain: stable
-          target: ${{ matrix.target }}
+      - name: Setup rust
+        run: |
+          rustup target add ${{ matrix.target }} --toolchain 1.86.0
 
       - uses: Swatinem/rust-cache@82a92a6e8fbeee089604da2575dc567ae9ddeaab
         with:

.github/workflows/_build-plugin-binaries.yml

@@ -68,9 +68,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          target: ${{ matrix.target }}
+      - name: Setup rust
+        run: |
+          rustup target add ${{ matrix.target }} --toolchain 1.86.0
 
       - uses: Swatinem/rust-cache@3cf7f8cc28d1b4e7d01e3783be10a97d55d483c8
 

.github/workflows/_test-binaries.yml

@@ -35,9 +35,9 @@ jobs:
           # TODO(#3144) Remove
           scarb-version: "2.11.0"
 
-      - uses: dtolnay/rust-toolchain@7b1c307e0dcbda6122208f10795a713336a9b35a
-        with:
-          toolchain: stable
+      - name: Setup rust
+        run: |
+          rustup target add ${{ matrix.target }} --toolchain 1.86.0
 
       - name: Download artifacts
         uses: actions/download-artifact@v4