chore: bump chromium to 121.0.6159.0 (main) (#40632)

* chore: bump chromium in DEPS to 121.0.6154.0

* chore: bump chromium in DEPS to 121.0.6155.0

* fix patches

* chore: update patches

* patch out reference to GetOcclusionTracker

* un-flag PIPOcclusionTracker

* chore: bump chromium in DEPS to 121.0.6157.0

* fix conflicts

https://chromium-review.googlesource.com/c/chromium/src/+/5038807

* add PIP occlusion tracker sources to chromium_src

* 5037591: Replace feature_list's Initialize* methods with Init*.

https://chromium-review.googlesource.com/c/chromium/src/+/5037591

* 4811903: Move //content/browser/renderer_host/input/synthetic_gesture_controller to //content/common/input

https://chromium-review.googlesource.com/c/chromium/src/+/4811903

* 4917953: usb: Add usb-unrestricted to permission policy

https://chromium-review.googlesource.com/c/chromium/src/+/4917953

* 5072395: Remove unused `creation_context` parameter from blink/public APIs

https://chromium-review.googlesource.com/c/chromium/src/+/5072395

* 5052035: [X11] Change AtomCache from a singleton to owned by Connection

https://chromium-review.googlesource.com/c/chromium/src/+/5052035

* fix v8/.patches

* node script/gen-libc++-filenames.js

* 5035771: Remove the SetImage method of ImageButton

https://chromium-review.googlesource.com/c/chromium/src/+/5035771

* fixup! 5052035: [X11] Change AtomCache from a singleton to owned by Connection

* fixup! 5035771: Remove the SetImage method of ImageButton

* chore: bump chromium in DEPS to 121.0.6159.0

* 4505903: [Extensions] Add lastAccessed property to chrome.tabs.Tab

https://chromium-review.googlesource.com/c/chromium/src/+/4505903

* update patches

* don't duplicate tabs API types

this causes weird memory bugs if the two get out of sync

* fix UAF in TrayIconCocoa

not sure why this is popping up just now ... this has been broken for ages afaict

* Revert "don't duplicate tabs API types"

This reverts commit 80dff2ef

.

This is failing tests with extensions API schema check failures, so
revert for now. we'll fix it later.

* revert v8 change causing node crashes

* chore: reduce diffs in revert_api_dcheck-fail_when_we_reenter_v8_while_terminating.patch

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Co-authored-by: electron-roller[bot] <84116207+electron-roller[bot]@users.noreply.github.com>
Co-authored-by: Jeremy Rose <jeremya@chromium.org>
Co-authored-by: PatchUp <73610968+patchup[bot]@users.noreply.github.com>
Co-authored-by: clavin <clavin@electronjs.org>
Co-authored-by: Charles Kerr <charles@charleskerr.com>