Updated the `KeyExists` from aws to keep the response metadata in the image resolver#317

Merged

JimBobSquarePants merged 2 commits intoSixLabors:mainfrom

mdupras:mdupras/cached-metadata-query

Mar 18, 2023

Commits on Mar 15, 2023

Updated the `KeyExists` from aws keep the response metadata in the image resolver.
mdupras
committed

Commits on Mar 18, 2023

Reverted nullable changes on S3 provider and resolver files
mdupras
committed