GeezerVison

Move _Py_PACK_VERSION() from pymacro.h to patchlevel.h.

PR generated with these shell commands on Linux:

    HEADERS=$(find Include -name "*.h")
    for minor in $(seq 1 9); do sed -i -e "s#0x030${minor}0000#_Py_PACK_VERSION(3, $minor)#g" $HEADERS; done
    sed -i -e "s#0x030[aA]0000#_Py_PACK_VERSION(3, 10)#g" $HEADERS
    sed -i -e "s#0x030[bB]0000#_Py_PACK_VERSION(3, 11)#g" $HEADERS
    sed -i -e "s#0x030[cC]0000#_Py_PACK_VERSION(3, 12)#g" $HEADERS
    sed -i -e "s#0x030[dD]0000#_Py_PACK_VERSION(3, 13)#g" $HEADERS
    sed -i -e "s#0x030[eE]0000#_Py_PACK_VERSION(3, 14)#g" $HEADERS
    sed -i -e "s#0x030[fF]0000#_Py_PACK_VERSION(3, 15)#g" $HEADERS
    sed -i -e "s#0x030a00A7#_Py_PACK_VERSION(3, 10)#g" Include/refcount.h

Manual replacements:

* 0x03050400 => _Py_PACK_FULL_VERSION(3, 5, 4, 0, 0)
* 0x03060100 => _Py_PACK_FULL_VERSION(3, 6, 1, 0, 0)