This CL is the first in a series that implements Turbofan support for
property accesses satisfying the following conditions:
1. The holder is a dictionary mode object.
2. The holder is a prototype.
3. The access is a load.

This feature will only be enabled if the build flag
v8_dict_property_const_tracking is set.

This particular CL does the following:

a) In PropertyAccessInfo::Kind, rename kDataConstant and
kAccessorConstant to kFastDataConstant and kFastAccessorConstant,
respectively, to indicate that these kinds are used for fast mode
holders.

b) In PropertyAccessInfo::Kind, add kDictionaryProtoDataConstant and
kDictionaryProtoAccessorConstant, which will be used for dictionary
mode holders (which must also be prototypes, as stated  above).

c) Add a member dictionary_index_ to PropertyAccessInfo, which is
used by the kinds mentioned in b)

Bug: v8:11248
Change-Id: Id1c10215aab287066a9765756f112c8035141013
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2718228
Commit-Queue: Frank Emrich <emrich@google.com>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73169}