Add support for generic S3

[GunniBusch]

I saw this line:

PBSCloudBackupModule/pbs-api-types/src/cloud/changer.rs

Line 15 in ab0e331

.format(&ApiStringFormat::PropertyString("^(aws|azure|gcp|sia)$"))

Reading this line, made me believe that the module will only support these s3 gateways, since the api, (yours) is limited to it. But would it be possible to just add those this string something like s3-generic, to allow the use of other s3 like backblaze b2?

[AZComputerSolutions]

There will be more to come on this as we get closer to public beta. Leaving the ticket open for the time being.

[GunniBusch]

There will be more to come on this as we get closer to public beta. Leaving the ticket open for the time being.

You actually don’t need to add more since you can just add a generic one for a s3 compatible one. Eg. By using aws s3 sdk and specifying a endpoint