[ObjC] Add support for removing runtime calls that perform retain count operations #7440
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A new activity is added that will remove calls to
objc_retain,objc_release,objc_autorelease, and related functions. It is disabled by default due to the fact it changes the semantics of the code. It can be enabled on a per-function basis via the Function Settings context menu or command palette entry, or it can be enabled in Open with Options or in user settings if a user would prefer it be on for an entire file or for all files they open.For now the activity is only eligible within arm64 binaries. Supporting x86_64 will require matching some slightly different IL patterns.