[Github] Remove separate tools checkout from pr-code workflows (llvm#159967)

These separate checkouts I believe were originally carried over from
when we were using pull_request_target. We needed two checkouts to
ensure we were not executing user supplied code. We kept them to ensure
we were using the latest version of the tools, but this was born mostly
out of a misunderstanding of how Github Actions works. All PRs directly
against main are executed as if merged into main, so already are using
the latest version of the tools no matter the branch point. Stacked PRs
still need to be rebased for changes to propagate but these files have
been pretty stable for the past two years or so and I can't imagine any
changes needed to keep things running on release/stacked PR branches.

Author: boomanaiden154

.github/workflows/pr-code-format.yml

@@ -32,19 +32,6 @@ jobs:
           base_sha: 'HEAD~1'
           sha: 'HEAD'
 
-      # We need to pull the script from the main branch, so that we ensure
-      # we get the latest version of this script.
-      - name: Fetch code formatting utils
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          repository: ${{ github.repository }}
-          ref: ${{ github.base_ref }}
-          sparse-checkout: |
-            llvm/utils/git/requirements_formatting.txt
-            llvm/utils/git/code-format-helper.py
-          sparse-checkout-cone-mode: false
-          path: code-format-tools
-
       - name: "Listed files"
         env:
           CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
@@ -65,10 +52,10 @@ jobs:
         with:
           python-version: '3.11'
           cache: 'pip'
-          cache-dependency-path: 'code-format-tools/llvm/utils/git/requirements_formatting.txt'
+          cache-dependency-path: 'llvm/utils/git/requirements_formatting.txt'
 
       - name: Install python dependencies
-        run: pip install -r code-format-tools/llvm/utils/git/requirements_formatting.txt
+        run: pip install -r llvm/utils/git/requirements_formatting.txt
 
       - name: Run code formatter
         env:
@@ -77,7 +64,7 @@ jobs:
         # Create an empty comments file so the pr-write job doesn't fail.
         run: |
           echo "[]" > comments &&
-          python ./code-format-tools/llvm/utils/git/code-format-helper.py \
+          python ./llvm/utils/git/code-format-helper.py \
             --write-comment-to-file \
             --token ${{ secrets.GITHUB_TOKEN }} \
             --issue-number $GITHUB_PR_NUMBER \

.github/workflows/pr-code-lint.yml

@@ -46,18 +46,6 @@ jobs:
         run: |
           echo "Changed files:"
           echo "$CHANGED_FILES"
-      
-      - name: Fetch code linting utils
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          repository: ${{ github.repository }}
-          ref: ${{ github.base_ref }}
-          sparse-checkout: |
-            llvm/utils/git/code-lint-helper.py
-            llvm/utils/git/requirements_linting.txt
-            clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
-          sparse-checkout-cone-mode: false
-          path: code-lint-tools
 
       - name: Install clang-tidy
         uses: aminya/setup-cpp@17c11551771948abc5752bbf3183482567c7caf0 # v1.1.1
@@ -70,7 +58,7 @@ jobs:
           python-version: '3.12'
 
       - name: Install Python dependencies
-        run: python3 -m pip install -r code-lint-tools/llvm/utils/git/requirements_linting.txt
+        run: python3 -m pip install -r llvm/utils/git/requirements_linting.txt
 
       # TODO: create special mapping for 'codegen' targets, for now build predefined set
       # TODO: add entrypoint in 'compute_projects.py' that only adds a project and its direct dependencies
@@ -107,7 +95,7 @@ jobs:
           CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
         run: |
           echo "[]" > comments &&
-          python3 ./code-lint-tools/llvm/utils/git/code-lint-helper.py \
+          python3 llvm/utils/git/code-lint-helper.py \
             --token ${{ secrets.GITHUB_TOKEN }} \
             --issue-number $GITHUB_PR_NUMBER \
             --start-rev HEAD~1 \