With this CL the name of an SFI is either stored directly on the SFI
itself (for uncompiled ones) or on the related ScopeInfo if present.

- Combine scope_info and name field on SFI into name_or_scope_info field
- Change the name of a couple of SFI accessors: name => Name,
  has_shared_name => HasSharedName, set_name => SetName
- Add Runtime::kGetFunctionName due to more complex SFI name accessing

Bug: v8:7066
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: Idcce158446c9447b92d9a15125d086952c6e0824
Reviewed-on: https://chromium-review.googlesource.com/964201
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52001}