Provide support for TIP 627 (Tcl 8.7a6+ and Tcl 9) TIP 627 introduces support for > 2^31 elements in object vectors (e.g., number of words in a single Tcl command). For details, see https://core.tcl-lang.org/tips/doc/trunk/tip/627.md
To provide also backwards compatibility, this change uses the macros TCL_COMMAND_OBJPROC, TCL_CREATEOBJCOMMAND, TCL_NRCALLOBJPROC, TCL_NRCREATECOMMAND, TCL_OBJCMDPROC_T, and TCL_OBJC_T.