Revert "IWYU modules/desktop_capture/"

This reverts commit 788e02e6bb23cc8d85416de61714fc236de053ca.

Reason for revert: breaks compilation downstream:
desktop_capturer_differ_wrapper.cc -> desktop_capture_metadata.h" include should be conditional.

Original change's description:
> IWYU modules/desktop_capture/
>
> using
>   find modules/desktop_capture/ -name "*.h" -o -name "*.cc" | grep -v win | grep -v wayland | grep -v mac | grep -v fuchsia | xargs tools_webrtc/iwyu/apply-include-cleaner
> followed by
>   tools_webrtc/gn_check_autofix.py -C out/Default/
> and git cl format
>
> Manual changes (mostly replacing C style headers with C++ ones) were done in PS3.
> PS5+PS6 brought back some platform-specific includes.
>
> BUG=webrtc:42226242
>
> Change-Id: I4b84fa6abc320de0c734a43efa84c6f7e434c9af
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/382140
> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
> Commit-Queue: Philipp Hancke <phancke@meta.com>
> Reviewed-by: Alexander Cooper <alcooper@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#44778}

Bug: webrtc:42226242, b/420792585
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I8cac586eda8fdaf9e20a6322383dd306887e8fa2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/393921
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Owners-Override: Danil Chapovalov <danilchap@webrtc.org>
Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Johannes Kron <kron@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#44784}