[libxml, libxslt] Match the default features to the upstream default

[saschanaz]

Fixes #44627
Fixes #44628

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version.
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

[LilyWangLL]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[LilyWangLL]

Could you please merge master to your commit?

git remote add upstream https://github.com/microsoft/vcpkg.git
git pull upstream master
git push origin libxml2

[LilyWangLL]

You need rerun command ./vcpkg x-add-version --all and push to branch libxml2 to resolve the baseline error.