Add explicit step to setup python

Author: mhegazy

.github/actions/setup-python/action.yml

@@ -18,6 +18,12 @@ runs:
   steps:
     - name: Install the latest version of uv
       uses: astral-sh/setup-uv@v5
+      with:
+        working-directory: ${{ inputs.repo-root }}
+        # Explicitly set where the pyproject.toml file is located untill we 
+        # a fix for https://github.com/astral-sh/setup-uv/issues/441
+        cache-dependency-glob: ${{ inputs.repo-root }}/**/pyproject.toml
+
     # uv misbehaves in the presence of the python 3.9 pythonarm64 Nuget package.
     # This is a workaround to remove it if it exists.
     - name: Uninstall pythonarm64 if installed

.github/workflows/swift-toolchain.yml

@@ -680,7 +680,10 @@ jobs:
           ref: ${{ inputs.swift_revision }}
           path: ${{ github.workspace }}/SourceCache/swift
           show-progress: false
-
+      - name: Setup python
+        uses: ./SourceCache/ci-build/.github/actions/setup-python
+        with:
+            repo-root: ${{ github.workspace }}/SourceCache/ci-build
       - name: Configure Tools
         run: |
           $LLVM_EXTERNAL_SWIFT_SOURCE_DIR = cygpath -m ${{ github.workspace }}/SourceCache/swift
@@ -1169,7 +1172,11 @@ jobs:
             Copy-Item -Path "${{ github.workspace }}/BinaryCache/Library/cmark-gfm-${{ inputs.swift_cmark_version }}/usr/lib/*.dylib" -Destination "${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr/lib/swift/host/compiler"
           }
 
-      - uses: actions/setup-python@v5
+      - name: Setup python
+        uses: ./SourceCache/ci-build/.github/actions/setup-python
+        with:
+            repo-root: ${{ github.workspace }}/SourceCache/ci-build
+
       - uses: jannekem/run-python-script-action@v1
         with:
           script: |
@@ -1682,6 +1689,11 @@ jobs:
           ndk-version: ${{ inputs.ANDROID_NDK_VERSION }}
           local-cache: true
 
+      - name: Setup python
+        uses: ./SourceCache/ci-build/.github/actions/setup-python
+        with:
+            repo-root: ${{ github.workspace }}/SourceCache/ci-build
+
       - name: Configure LLVM
         if: matrix.os != 'Android' || inputs.build_android
         run: |
@@ -3456,7 +3468,11 @@ jobs:
         run: |
           cmake --build ${{ github.workspace }}/BinaryCache/libdispatch --target install
 
-      - uses: actions/setup-python@v5
+      - name: Setup python
+        uses: ./SourceCache/ci-build/.github/actions/setup-python
+        with:
+          repo-root: ${{ github.workspace }}/SourceCache/ci-build
+
       - uses: jannekem/run-python-script-action@v1
         if: matrix.os != 'Android' || inputs.build_android
         with: