[6.2] Update to Python 3.10 and package it. (#1066)

This cherry-picks the following PRs:
* #983
* #1003
* #1013
* #1057

Python 3.10 is embedded into the installer for 6.2 since
swiftlang/swift-installer-scripts#491

Co-authored-by: Mohamed Hegazy <[email protected]>

Author: Steelskin

.github/workflows/build-toolchain.yml

@@ -221,6 +221,8 @@ jobs:
       windows_x64_build_runner: ${{ steps.context.outputs.windows_x64_build_runner }}
       windows_x64_compilers_runner: ${{ steps.context.outputs.windows_x64_compilers_runner }}
       mac_build_runner: ${{ steps.context.outputs.mac_build_runner }}
+      python_version: ${{ steps.context.outputs.python_version }}
+      python_download_locations: ${{ steps.context.outputs.python_download_locations }}
       windows_arm64_build_matrix: ${{ steps.setup-matrix.outputs.windows_arm64_build_matrix }}
       windows_arm64_host_matrix: ${{ steps.setup-matrix.outputs.windows_arm64_host_matrix }}
       windows_arm64_target_matrix: ${{ steps.setup-matrix.outputs.windows_arm64_target_matrix }}
@@ -233,6 +235,38 @@ jobs:
     steps:
       - id: context
         name: Generate Build Context
+        env:
+          PYTHON_DOWNLOAD_LOCATIONS: >-
+            {
+              "3.9.10": {
+                "AMD64": {
+                  "URL": "https://www.nuget.org/api/v2/package/python/3.9.10",
+                  "SHA256": "ac43b491e9488ac926ed31c5594f0c9409a21ecbaf99dc7a93f8c7b24cf85867"
+                },
+                "ARM64": {
+                  "URL": "https://www.nuget.org/api/v2/package/pythonarm64/3.9.10",
+                  "SHA256": "429ada77e7f30e4bd8ff22953a1f35f98b2728e84c9b1d006712561785641f69"
+                }
+              },
+              "3.10.1": {
+                "AMD64": {
+                  "URL": "https://www.nuget.org/api/v2/package/python/3.10.1",
+                  "SHA256": "987a0e446d68900f58297bc47dc7a235ee4640a49dace58bc9f573797d3a8b33"
+                },
+                "AMD64_Embedded": {
+                  "URL": "https://www.python.org/ftp/python/3.10.1/python-3.10.1-embed-amd64.zip",
+                  "SHA256": "502670dcdff0083847abf6a33f30be666594e7e5201cd6fccd4a523b577403de"
+                },
+                "ARM64": {
+                  "URL": "https://www.nuget.org/api/v2/package/pythonarm64/3.10.1",
+                  "SHA256": "16becfccedf1269ff0b8695a13c64fac2102a524d66cecf69a8f9229a43b10d3"
+                },
+                "ARM64_Embedded": {
+                  "URL": "https://www.python.org/ftp/python/3.10.1/python-3.10.1-embed-arm64.zip",
+                  "SHA256": "1f9e215fe4e8f22a8e8fba1859efb1426437044fb3103ce85794630e3b511bc2"
+                }
+              }
+            }
         run: |
           # TODO(compnerd) can we make this more silent?
           sudo DEBIAN_FRONTEND=noninteractive apt-get -qq update -yq
@@ -376,6 +410,12 @@ jobs:
           echo ANDROID_NDK_VERSION=r27c >> ${GITHUB_OUTPUT}
           echo ANDROID_CLANG_VERSION=18 >> ${GITHUB_OUTPUT}
 
+          # Set Python version used in the build
+          echo python_version=3.10.1 >> ${GITHUB_OUTPUT}
+
+          # Set Python download locations
+          echo python_download_locations=$(jq -c '.' <<< "${PYTHON_DOWNLOAD_LOCATIONS}") >> ${GITHUB_OUTPUT}
+
       - uses: actions/upload-artifact@v4
         if: inputs.create_snapshot == true
         with:
@@ -834,6 +874,8 @@ jobs:
       default_build_runner: ${{ needs.context.outputs[format('windows_{0}_build_runner', needs.context.outputs.windows_build_cpu)] }}
       compilers_build_runner: ${{ needs.context.outputs[format('windows_{0}_compilers_runner', needs.context.outputs.windows_build_cpu)] }}
       build_android: ${{ inputs.build_android }}
+      python_version: ${{ needs.context.outputs.python_version }}
+      python_download_locations: ${{ needs.context.outputs.python_download_locations }}
     secrets:
       SYMBOL_SERVER_PAT: ${{ secrets.SYMBOL_SERVER_PAT }}
       CERTIFICATE: ${{ secrets.CERTIFICATE }}
@@ -909,6 +951,8 @@ jobs:
       swift_tag: ${{ needs.context.outputs.swift_tag }}
       default_build_runner: ${{ needs.context.outputs.mac_build_runner }}
       compilers_build_runner: ${{ needs.context.outputs.mac_build_runner }}
+      python_version: ${{ needs.context.outputs.python_version }}
+      python_download_locations: ${{ needs.context.outputs.python_download_locations }}
     secrets:
       SYMBOL_SERVER_PAT: ${{ secrets.SYMBOL_SERVER_PAT }}
       CERTIFICATE: ${{ secrets.CERTIFICATE }}