Revert "fix: update experiment to use different setup (#169728)" and "feat: experimental workflow for Linux tool-tests-general (#169706)" (#169770)

The Linux_tool-tests-general check is causing errors on PRs such as
Dart->engine rolls (example:
https://github.com/flutter/flutter/pull/169763)

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

@@ -1,63 +0,0 @@
-name: Tool tests general - experiment
-
-on:
-  pull_request:
-    branches: [master]
-    paths:
-      - '.github/workflows/tool-test-general.yml'
-      - '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: android-actions/setup-android@9fc6c4e9069bf8d3d10b2204b1fb8f6ef7065407
-        with:
-          cmdline-tools-version: 13114758
-
-      # The following step is only run LOCALLY - Github runners have everything on them
-      - name: install android
-        if: ${{ env.ACT }}
-        run: |
-          sdkmanager "platform-tools" "platforms;android-36" "build-tools;36.0.0"
-
-      - name: Checkout code
-        uses: actions/checkout@v4
-
-      - name: Path Update
-        run: |
-          echo "$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