Execute agent with phpt tests delivered with PHP source code #154

Job	Run time
build / build-agent-library (linux-x86-64)	13m 34s
build / build-agent-library (linuxmusl-x86-64)	11m 57s
run-phpt-tests (7.2)	30m 53s
run-phpt-tests (7.3)	30m 6s
run-phpt-tests (7.4)	23m 19s
run-phpt-tests (8.0)	24m 14s
run-phpt-tests (8.1)	21m 24s
run-phpt-tests (8.2)	24m 33s
	3h 0m 0s

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