[cleanup] Migrate `absl::in_place` to `std::in_place`

Self-explanatory.

Fixed: webrtc:342905193
Change-Id: I3cf1ec99ef6867bb33289977246725badf2bfcfe
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/363360
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Auto-Submit: Ho Cheung <hocheung@chromium.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43071}