Merge pull request #30043 from compnerd/pythonkit-install

build: actually install PythonKit

Author: compnerd

utils/build-presets.ini

@@ -2395,6 +2395,7 @@ stress-test
 mixin-preset=tensorflow_osx_base
 tensorflow-swift-apis
 pythonkit
+install-pythonkit
 skip-test-cmark
 skip-test-swift
 skip-test-swiftpm
@@ -2409,6 +2410,7 @@ mixin-preset=
     mixin_codesigning
 tensorflow-swift-apis
 pythonkit
+install-pythonkit
 darwin-toolchain-installer-package=%(darwin_toolchain_installer_package)s
 
 [preset: tensorflow_osx,no_test,installer]
@@ -2421,13 +2423,15 @@ darwin-toolchain-installer-package=%(darwin_toolchain_installer_package)s
 mixin-preset=buildbot_linux
 tensorflow-swift-apis
 pythonkit
+install-pythonkit
 # The swift-package-tests fail when run with python3.
 test-installable-package=
 
 [preset: tensorflow_linux,no_test]
 mixin-preset=buildbot_linux,no_test
 tensorflow-swift-apis
 pythonkit
+install-pythonkit
 # The swift-package-tests fail when run with python3.
 test-installable-package=