Add FramePointerKind::NonLeafNoReserve (#163775)
This patch adds a new `FramePointerKind::NonLeafNoReserve` and makes it
the default for `-momit-leaf-frame-pointer`.
It also adds a new commandline option `-m[no-]reserve-frame-pointer-reg`.
This should fix #154379, the main impact of this patch can be found in
`clang/lib/Driver/ToolChains/CommonArgs.cpp`.
