Git bisect workflow on CI runners (#10316)

* #0: remove unset of slow dispatch env var

* #0: new git bisect workflow

.github/workflows/bisect-dispatch.yaml

@@ -0,0 +1,57 @@
+name: "Git bisect dispatch"
+
+on:
+  workflow_dispatch:
+    inputs:
+      arch:
+        required: true
+        type: choice
+        options:
+          - grayskull
+          - wormhole_b0
+      runner-label:
+        required: true
+        type: string
+      good-commit:
+        required: true
+        type: string
+      bad-commit:
+        required: true
+        type: string
+      command:
+        required: true
+        type: string
+      description:
+        type: string
+        required: false
+
+jobs:
+  build-artifact:
+    uses: ./.github/workflows/build-artifact.yaml
+    secrets: inherit
+  test-dispatch:
+    needs: build-artifact
+    timeout-minutes: 1440
+    env:
+      TT_METAL_ENV: ${{ vars.TT_METAL_ENV }}
+      ARCH_NAME: ${{ inputs.arch }}
+    environment: dev
+    runs-on: ${{ inputs.runner-label }}
+    name: Custom test command ${{ inputs.description }}
+    steps:
+      - uses: tenstorrent-metal/metal-workflows/.github/actions/[email protected]
+      - name: Set up dyanmic env vars for build
+        run: |
+          echo "TT_METAL_HOME=$(pwd)" >> $GITHUB_ENV
+      - uses: actions/download-artifact@v4
+        with:
+          name: TTMetal_build_${{ inputs.arch }}
+      - name: Extract files
+        run: tar -xvf ttm_${{ inputs.arch }}.tar
+      - uses: ./.github/actions/install-python-deps
+      - name: Run pre/post regression tests in a loop
+        run: |
+          source ${{ github.workspace }}/python_env/bin/activate
+          cd $TT_METAL_HOME
+          export PYTHONPATH=$TT_METAL_HOME
+          ./tests/scripts/tt_bisect.sh -f ${{ inputs.command }} -b ${{ inputs.bad-commit }} -g ${{ inputs.good-commit }}

tests/scripts/tt_bisect.sh

@@ -16,7 +16,6 @@ END
 cd $TT_METAL_HOME
 source python_env/bin/activate
 export PYTHONPATH=$TT_METAL_HOME
-unset TT_METAL_SLOW_DISPATCH_MODE
 
 timeout_duration=2m
 while getopts "f:sg:b:t:" opt; do