single_version_only for actx.compile #1726

Job	Run time
Mypy	3m 15s
Examples Conda Py3	2m 47s
Documentation	3m 13s
Tests for downstream project meshmode	13m 22s
Tests for downstream project grudge	11m 45s
Pylint	3m 5s
Pytest Conda Py3 Intel	3m 41s
Pytest Conda Py3 POCL	3m 34s
Tests for downstream project mirgecom	5s
Ruff	4s
Tests for downstream project mirgecom_examples	5s
Typos	3s
	44m 59s

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