Do not add trailing `+` in `TypeNode#id` for virtual types #9362

Job	Run time
deploy_api_docs	0s
check_format	2m 36s
x86_64-gnu-test (1.2.2, USE_PCRE1=true)	39m 24s
x86_64-gnu-test (1.3.2, USE_PCRE1=true)	36m 23s
x86_64-gnu-test (1.4.1, USE_PCRE1=true)	37m 10s
x86_64-gnu-test (1.5.1, USE_PCRE1=true)	46m 8s
x86_64-gnu-test (1.6.2, USE_PCRE1=true)	45m 2s
x86_64-gnu-test (1.0.0, FLAGS=-Dwithout_ffi USE_PCRE1=true)	44m 56s
x86_64-gnu-test (1.1.1, FLAGS=-Dwithout_ffi USE_PCRE1=true)	53m 45s
x86_64-gnu-test (1.7.3)	43m 35s
x86_64-gnu-test (1.8.2)	42m 10s
x86_64-gnu-test (1.9.2)	36m 6s
x86_64-gnu-test-preview_mt	7m 53s
x86_64-musl-test	49m 55s
	8h 5m 3s

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