Patch `subprocess.Popen` when running on Windows under Positron #1243

Job	Run time
OS=macOS-latest R=release py=3.10	3m 51s
OS=windows-latest R=release py=3.10	10m 9s
OS=ubuntu-latest R=release py=3.10	4m 24s
OS=macOS-latest R=oldrel py=3.10	3m 10s
OS=ubuntu-latest R=oldrel-1 py=3.9	4m 53s
OS=ubuntu-latest R=oldrel-2 py=3.9	5m 16s
OS=ubuntu-20.04 R=oldrel-3 py=3.8	5m 0s
OS=ubuntu-20.04 R=oldrel-4 py=3.8	4m 25s
OS=ubuntu-latest R=release py=3.7	5m 52s
OS=ubuntu-latest R=release py=3.8	4m 38s
OS=ubuntu-latest R=release py=3.9	4m 48s
OS=ubuntu-latest R=release py=3.11	4m 20s
OS=ubuntu-latest R=release py=3.12	4m 52s
OS=ubuntu-latest R=devel py=3.12	4m 41s
	1h 10m 19s

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