Add currently selected python environment to path for wheel builds #3636

Job	Run time
run-tests (windows_amd64, windows-latest, 18.x, stable) / Test VSCode Extension	13m 26s
run-tests (darwin_amd64, macos-latest, 18.x, stable) / Test VSCode Extension	19m 31s
Package VSIX	1m 35s
	34m 32s

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