Update to Go 1.22 and minor refactors

[phlg]

There's still a couple of TODO's in the branch code, one of which I can clear soon. Until then, please leave as draft and don't merge the PR.

For the rest, here's a barebones patch note :

• Update to Go 1.22
  • which allows using cmp.Or to save some lines when deciding whether to use a user's metadata.name or spec.secretName to
• Added some 8-characters long names to the loggers when there weren't any, to have more uniform logs (eg : see .WithName("bcktCtrl"))
• Turned some functions into methods to remove some unnecessary arguments
• Renamed some functions in the S3User controller to clarify the logic
• Reworked (and added some additional checks) in minioS3Client.go to better manage errors
• Changes to the various statuses used in the S3User controller
• Minor rewording for some log and status condition messages.