This update for libqt5-qtwebengine fixes the following issues:

Update to version 5.15.10:

* Fix top level build with no widget
* Fix read-after-free on EGL extensions
* Update Chromium
* Add workaround for unstable gn on macOS in ci
* Pass archiver to gn build
* Fix navigation to non-local URLs
* Add support for universal builds for qtwebengine and qtpdf
*  Enable Apple Silicon support
*  Fix cross compilation x86_64->arm64 on mac
*  Bump version to 5.15.10
*  CustomDialogs: Make custom input fields readable in dark mode
*  CookieBrowser: Make alternating rows readable in dark mode

* Update Chromium:
  * Bump V8_PATCH_LEVEL
  * Fix clang set-but-unused-variable warning
  * Fix mac toolchain python linker script call
  * Fix missing dependency for gpu sources
  * Fix python calls
  * Fix undefined symbol for universal link
  * Quick fix for regression in service workers by reverting
    backports
  * [Backport] CVE-2022-0797: Out of bounds memory access
    in Mojo
  * [Backport] CVE-2022-1125
  * [Backport] CVE-2022-1138: Inappropriate implementation
    in Web Cursor.
  * [Backport] CVE-2022-1305: Use after free in storage
  * [Backport] CVE-2022-1310: Use after free in regular
    expressions
  * [Backport] CVE-2022-1314: Type Confusion in V8
  * [Backport] CVE-2022-1493: Use after free in Dev Tools
  * [Backport] On arm64 hosts, set host_cpu to 'arm64', not 'arm'
  * [Backport] Security Bug 1296876
  * [Backport] Security bug 1269999
  * [Backport] Security bug 1280852
  * [Backport] Security bug 1292905
  * [Backport] Security bug 1304659
  * [Backport] Security bug 1306507