[THRIFT-5757] Unit tests for php lib #190

Job	Run time
compiler (ubuntu-20.04)	2m 50s
compiler (ubuntu-22.04)	2m 19s
lib-java-kotlin	4m 41s
lib-go (1.21)	2m 1s
lib-php (7.1)	1m 0s
lib-go (1.22)	2m 9s
lib-python (3.x)	1m 33s
lib-php (7.2)	1m 2s
lib-php (7.3)	1m 28s
lib-php (7.4)	1m 4s
lib-rust	2m 56s
lib-php (8)	1m 6s
lib-swift	1m 6s
lib-php (8.1)	1m 4s
lib-php (8.2)	1m 6s
lib-php (8.3)	1m 16s
cross-test (java, java,kotlin)	2m 2s
cross-test (java, go,rs)	1m 19s
cross-test (java, swift)	37s
cross-test (kotlin, java,kotlin)	33s
cross-test (kotlin, go,rs)	33s
cross-test (kotlin, swift)	28s
cross-test (go, java,kotlin)	53s
cross-test (go, go,rs)	47s
cross-test (go, swift)	48s
cross-test (rs, java,kotlin)	47s
cross-test (rs, go,rs)	35s
cross-test (rs, swift)	53s
cross-test (swift, java,kotlin)	34s
cross-test (swift, go,rs)	59s
cross-test (swift, swift)	56s
	41m 25s

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