Add CXXRecordDecl.IsPOD. #547

Job	Run time
macos-arm64 (arm64, debug, macos)	3m 37s
windows-arm64 (arm64, debug, windows)	6m 10s
linux-x64 (x64, debug, ubuntu)	3m 41s
macos-arm64 (arm64, release, macos)	2m 52s
windows-x64 (x64, release, windows)	6m 13s
linux-x64 (x64, release, ubuntu)	3m 43s
windows-arm64 (arm64, release, windows)	5m 19s
windows-x64 (x64, debug, windows)	5m 17s
linux-arm64 (arm64, release, ubuntu)	3m 56s
linux-arm64 (arm64, debug, ubuntu)	3m 18s
sign-nuget	0s
publish-nightlies-azure	0s
publish-nightlies-github	0s
	44m 6s

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