Most places only use IndexInfo (and may not even need that), so replace
the use of ParseRepositoryInfo for NewIndexInfo, and move the RepositoryInfo
type to the trust package, which uses it as part of its ImageRefAndAuth
struct.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 21e8bbc8a2)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>