[sentry-native] update to 0.12.8

[AenBleidd]

• 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.

[Copilot]

Pull request overview

This PR updates the sentry-native port from version 0.12.7 to 0.12.8, following vcpkg's standard versioning workflow.

Changes:

• Updated sentry-native package version to 0.12.8
• Updated the SHA512 hash for the new release archive
• Updated version database files to reflect the new version

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
ports/sentry-native/vcpkg.json	Updated version field from 0.12.7 to 0.12.8
ports/sentry-native/portfile.cmake	Updated SHA512 hash for the 0.12.8 release archive
versions/s-/sentry-native.json	Added new version entry with git-tree hash
versions/baseline.json	Updated baseline version to 0.12.8

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