As a follow-up of
https://chromium-review.googlesource.com/c/v8/v8/+/3481475,
this renames a few more operations related to property stores to keep
them consistent and adds comments to explain about what they do.

Summary of the renamed identifiers:

- SetPropertyInLiteral -> CreateDataProperty: this implements
  [[CreateDataProperty]] in the spec which does [[DefineOwnProperty]]
  instead of [[Set]], so rename for clarity.
- IsStoreIC(), IsStoreICKind() -> IsSetNamedIC(), IsSetNamedICKind():
  these only check whether the feedback kind is kSetNamedSloppy or
  kSetNamedStrict, so the scope can be narrowed.
- StoreMode::kOrdinary -> StoreMode::kSet: this implements [[Set]]
  in the spec and is used by both KeyedStoreIC and
  StoreIC to set the properties when there is no feedback.
- StoreMode::kInLiteral -> StoreMode::kDefineKeyedOwnInLiteral:
  this implements [[CreateDataProperty]] while expecting the receiver
  to be a JSObject created by us (the `InLiteral` part). Prepend
  `DefineKeyedOwn` to it so that it's more aligned with other
  StoreModes - it should be possible to just merge this into the
  more generic StoreMode::kDefineKeyedOwn later.
- KeyedStoreGenericAssembler::SetProperty ->
  KeyedStoreGenericAssembler::StoreProperty: these helpers are used by
  both define and set operations, distinguished with the StoreMode,
  so rename it to the more generic StoreProperty.

Bug: v8:12548
Change-Id: Iccef673c1dc707bbdbf010f02f7db1e9ec32b3e4
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3557690Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Joyee Cheung <joyee@igalia.com>
Cr-Commit-Position: refs/heads/main@{#79694}