[HarfBuzz] Update Port to 2.8.1

[kirawi]

Describe the pull request
Updates HarfBuzz to 2.8.1

• Which triplets are supported/not supported? Have you updated the CI baseline?

  No change

• Does your PR follow the maintainer guide?

  Yes

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  Yes

[ghost]

All CLA requirements met.

[kirawi]

REGRESSION: paraview:x86-windows. If expected, add paraview:x86-windows=fail to .\scripts\ci.baseline.txt. I'm confused.

[JonLiu1993]

@kirawi,please Keep the format of patch2 correct

[JonLiu1993]

@kirawi ,please take a look :

CMake Error at D:/downloads/tools/cmake-3.19.2-windows/cmake-3.19.2-win32-x86/share/cmake-3.19/Modules/FindPackageHandleStandardArgs.cmake:218 (message):
  Could NOT find Gettext (missing: GETTEXT_MSGMERGE_EXECUTABLE
  GETTEXT_MSGFMT_EXECUTABLE)

[JonLiu1993]

The another failures caused by popsift will be fixed by #17277.

CMake Error at ports/popsift/portfile.cmake:9 (include):
  include could not find load file:

    D:/installed/x64-windows/share/vcpkg_find_cuda/vcpkg_find_cuda.cmake

[kirawi]

@kirawi,please Keep the format of patch2 correct

Sorry, could you elaborate on this as well as the CMake error you commented? I'm afraid I don't quite understand. I also applied the changes you requested, but I'm having trouble getting versions/h-/harfbuzz.json to update with vcpkg x-add-version harfbuzz. It simply does not update, even after deleting the entry that's currently there in this PR.

On a new clone of the main repo, these were the steps I followed to get the same result:

1. Update ports/harfbuzz/portfile.cmake, ports/harfbuzz/vcpkg.json, and versions/baseline.json with the same changes here.
2. Apply the changes you requested, and change the value of port-version in versions/baseline.json to 0.
3. Run vcpkg x-add-version --all.

However, I'm also getting the same result even if I apply the exact same changes in the PR as it is now... I must be missing a step here that I followed when I originally opened the PR. I apologize, I'm not familiar with these tools or the C/C++ toolkit.

[JonLiu1993]

@kirawi ,Sometimes the error in CI may not be the problem of the port you modified, it may be caused by the port you rely on or other port errors on CI. At present, all CI problems have been fixed, and your pr is ready to merge.

[JonLiu1993]

@kirawi ，please modify the content I marked, and then I can mark review

[kirawi]

All checks have passed.

[strega-nil-ms]

@kirawi can you merge with latest?

[strega-nil-ms]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[kirawi]

Looks like x64_windows froze on marble[core], and x64_windows_static_md failed to build opencv4 and kf5itemviews. CI is not an easy beast to work with ^_^

[PhoebeHui]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[kirawi]

x86_windows failed on an unrelated port.

[kirawi]

All checks have passed.

[PhoebeHui]

@dan-shaw, could you help merge this PR?

[kirawi]

I'll go ahead and bump the version to 2.8.1