Ensure VCALL flag is turned off when suffixed by a ? or ! #2598

Job	Run time
build-jruby	44s
build-without-assertions (ubuntu-20.04)	22s
build-without-assertions (ubuntu-22.04)	29s
build-debug-mode (ubuntu-latest)	29s
build-debug-mode (macos-latest)	1m 10s
build-debug-mode (windows-latest)	2m 56s
build (ubuntu-latest)	37s
build (macos-latest)	3m 45s
build (windows-latest)	3m 0s
gem-package	8s
lex-discourse	1m 22s
lex-ruby	2m 20s
lex-top-100	6m 10s
memcheck	9m 5s
gem-install (3.2, ubuntu-latest)	27s
gem-install (3.2, macos-latest)	1m 12s
gem-install (3.2, windows-latest)	3m 32s
gem-install (head, ubuntu-latest)	1m 37s
gem-install (head, macos-latest)	2m 54s
gem-install (head, windows-latest)	8m 57s
	51m 16s

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