Upgrade vcpkg submodule and handle fallout.

[Hoikas]

Per @dpogue:

The version of vcpkg we've currently got in Plasma breaks on newer macOS versions (which is a problem because GitHub is in the process of making macos-latest point at macOS 11, where it's broken

Therefore, we update vcpkg. If you experience problems with re-configuring in CMake, delete your cache!

Updated Libraries:

• ASIO 1.19.2 -> 1.20.0
• curl 7.79.1 -> 7.80.0
• freetype 2.11.0 -> 2.11.0#2
• libjpeg-turbo 2.0.6#3 -> 2.1.2
• liblzma 5.2.5#3 -> 5.2.5#4
• libpng 1.6.37#15 -> 1.6.37#16
• libwebm 1.0.0.27 -> 1.0.0.28#1
• OpenSSL 1.1.11l#1 -> 1.1.11l#3
• Python 3.9.7 -> 3.10.1#3
• string_theory 3.4#1 -> 3.5
• zlib 1.2.11#12 -> 1.2.11#13

Blocking Problems:

• Python 3.10.1 is broken in the MS repo, and this PR is using the fix in my repo.
  • Fixed by [python3] Fix feature deprecated-win7-support. microsoft/vcpkg#22090
• The libwebm port is broken in the MS repo.
  • Broken by [libwebm] Update to 1.0.0.28 microsoft/vcpkg#21031
  • Fixed by [libwebm] Install the public header files microsoft/vcpkg#22189

[Hoikas]

CI is failing because of the libwebm hack I used. It needs to be fixed upstream.

[Hoikas]

This will be ready to go when microsoft/vcpkg#22189 is merged. I've gone ahead and updated the submodule in this PR to use it.

[Hoikas]

Fixed the problem with webm debug. Ready for review for real, this time...