Fix codegen spec for `ProcPointer` of virtual type #12080

Job	Run time
deploy_api_docs	0s
check_format	1m 36s
x86_64-gnu-test-preview_mt	5m 42s
x86_64-gnu-test (1.7.3)	33m 48s
x86_64-musl-test	35m 24s
x86_64-gnu-test (1.8.2)	34m 55s
x86_64-gnu-test (1.9.2)	36m 44s
x86_64-gnu-test (1.10.1)	33m 5s
x86_64-gnu-test (1.11.2)	33m 35s
x86_64-gnu-test (1.12.2)	37m 1s
x86_64-gnu-test (1.13.1)	35m 1s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	32m 53s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	34m 47s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	35m 54s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	34m 58s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	37m 16s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	36m 24s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	33m 25s
	8h 52m 28s

Provide feedback