feat: experimental workflow for Linux tool-tests-general (#169706)

Demonstrates running Linux tool-tests-general running on workflows.

Can be run locally using ACT: `gh act --workflows
".github/workflows/tool-test-general.yml" --secret-file "" --var-file ""
--input-file "" --eventpath ""` - except this works only in VSCode since
tty isn't attached.

.github/workflows/tool-test-general.yml

@@ -0,0 +1,56 @@
+name: Tool tests general - experiment
+
+on:
+  pull_request:
+    branches: [master]
+    paths:
+      - 'dev/**'
+      - 'packages/flutter_tools/**'
+      - 'bin/**'
+      - '.ci.yaml'
+      - 'engine/**'
+      - 'DEPS'
+  push:
+    branches: [main]
+
+jobs:
+  Linux_tool-tests-general:
+    permissions:
+      contents: read
+
+    runs-on: ubuntu-latest
+
+    steps:
+      # The following step is only run LOCALLY - Github runners have everything on them
+      - name: Set up our JDK environment
+        if: ${{ env.ACT }}
+        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      # The following step is only run LOCALLY - Github runners have everything on them
+      - name: Setup Android SDK
+        if: ${{ env.ACT }}
+        uses: amyu/setup-android@v4
+        with:
+          sdk-version: 36
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Path Update
+        run: |
+          echo "$PWD/bin" >> "$GITHUB_PATH"
+
+      - name: Flutter Doctor
+        run: |
+          flutter doctor
+
+      - name: Get packages
+        run: |
+          flutter update-packages
+
+      - name: Tool Test
+        run: |
+          SHARD=tool_tests SUBSHARD=general dart --enable-asserts dev/bots/test.dart