ci: replace SSH deploy key with MY_REPO_PAT for submodule auth

mazduino org policy blocks adding SSH deploy keys to repositories.
Replace webfactory/ssh-agent + RUSEFI_CORE_DEPLOY_KEY with git URL
rewrite using MY_REPO_PAT across all three workflows that need the
mazduino/rusefi-core submodule.

Author: amrikarisma

.github/workflows/build-matrix.yaml

@@ -11,16 +11,15 @@ jobs:
     outputs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
-      - uses: webfactory/ssh-agent@v0.9.0
-        with:
-          ssh-private-key: ${{ secrets.RUSEFI_CORE_DEPLOY_KEY }}
-
       - uses: actions/checkout@v4
         with:
           submodules: false
+          token: ${{ secrets.MY_REPO_PAT }}
 
       - name: Checkout submodules
-        run: git submodule update --init --force --depth=1
+        run: |
+          git config --global url."https://x-access-token:${{ secrets.MY_REPO_PAT }}@github.com/".insteadOf "git@github.com:"
+          git submodule update --init --force --depth=1
 
       - name: Set matrix
         id: set-matrix
@@ -46,16 +45,15 @@ jobs:
       matrix: ${{fromJson(needs.generate-matrix.outputs.matrix)}}
 
     steps:
-      - uses: webfactory/ssh-agent@v0.9.0
-        with:
-          ssh-private-key: ${{ secrets.RUSEFI_CORE_DEPLOY_KEY }}
-
       - uses: actions/checkout@v4
         with:
           submodules: false
+          token: ${{ secrets.MY_REPO_PAT }}
 
       - name: Checkout submodules
-        run: git submodule update --init --force --depth=1
+        run: |
+          git config --global url."https://x-access-token:${{ secrets.MY_REPO_PAT }}@github.com/".insteadOf "git@github.com:"
+          git submodule update --init --force --depth=1
 
       - name: Set run variables
         id: set-variables

.github/workflows/nightly-release.yaml

@@ -16,16 +16,15 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
       tag: ${{ steps.set-tag.outputs.tag }}
     steps:
-      - uses: webfactory/ssh-agent@v0.9.0
-        with:
-          ssh-private-key: ${{ secrets.RUSEFI_CORE_DEPLOY_KEY }}
-
       - uses: actions/checkout@v4
         with:
           submodules: false
+          token: ${{ secrets.MY_REPO_PAT }}
 
       - name: Checkout submodules
-        run: git submodule update --init --force --depth=1
+        run: |
+          git config --global url."https://x-access-token:${{ secrets.MY_REPO_PAT }}@github.com/".insteadOf "git@github.com:"
+          git submodule update --init --force --depth=1
 
       - name: Set matrix
         id: set-matrix
@@ -53,16 +52,15 @@ jobs:
       matrix: ${{ fromJson(needs.generate-matrix.outputs.matrix) }}
 
     steps:
-      - uses: webfactory/ssh-agent@v0.9.0
-        with:
-          ssh-private-key: ${{ secrets.RUSEFI_CORE_DEPLOY_KEY }}
-
       - uses: actions/checkout@v4
         with:
           submodules: false
+          token: ${{ secrets.MY_REPO_PAT }}
 
       - name: Checkout submodules
-        run: git submodule update --init --force --depth=1
+        run: |
+          git config --global url."https://x-access-token:${{ secrets.MY_REPO_PAT }}@github.com/".insteadOf "git@github.com:"
+          git submodule update --init --force --depth=1
 
       - uses: ./ext/rusefi/.github/workflows/custom-board-build
         with:

.github/workflows/unit-tests.yaml

@@ -21,16 +21,15 @@ jobs:
           - mazduino-mega100-512
 
     steps:
-      - uses: webfactory/ssh-agent@v0.9.0
-        with:
-          ssh-private-key: ${{ secrets.RUSEFI_CORE_DEPLOY_KEY }}
-
       - uses: actions/checkout@v4
         with:
           submodules: false
+          token: ${{ secrets.MY_REPO_PAT }}
 
       - name: Checkout submodules
-        run: git submodule update --init --force --depth=1
+        run: |
+          git config --global url."https://x-access-token:${{ secrets.MY_REPO_PAT }}@github.com/".insteadOf "git@github.com:"
+          git submodule update --init --force --depth=1
 
       - name: Checkout rusefi submodules
         run: git -C ext/rusefi submodule update --init --force --depth=1