* openexr: Bump to 2.5.8
The x-add-version and patch fixes will be in next commits.
* openexr: vcpkg.json: Use "version" instead of "version-string"
* openexr: vcpkg.json: Add SPDX license identifier
* openexr: Clean 0001*-find_package patch
As upstream has cleaned it up already.
* openexr: Clean 0002-fixup_cmake_exports** patch from old whitespace fix
The upstream was already fixed it.
* openexr: Drop symlinks and find-pkg patches as it were handled at upstream
* openexr: Fix ARM build
See upstream fix for details in openexr/openexr#1216:
https://github.com/AcademySoftwareFoundation/openexr/pull/1216
* openexr: Migrate the old function to new vcpkg-cmake-config helpers
* openexr/portfile: Add comment about version for commit revision
* openexr: Update baseline via `vcpkg x-add-version openexr'
