fix(files): unexpected checksum header in multipart uploads caused by S3 default integrity change in AWS SDK for PHP

[cfiehe]

• Resolves: [Bug]: Unexpected checksum header in multipart uploads caused by S3 default integrity change in AWS SDK for PHP >= v3.337.0 #56077

Summary

This commit makes the configuration settings request_checksum_calculation and response_checksum_validation of the S3Client from the AWS SDK for PHP configurable via the objectstore S3 configuration section of the config.php. Allowed values are when_required and when_supported (new default since AWS SDK for PHP >= 3.337.0).

Signed-off-by: Fiehe Christoph c.fiehe@eurodata.de

[skjnldsv]

Code make sense

[kesselb]

Should be noted at https://github.com/nextcloud/documentation/edit/master/admin_manual/configuration_files/primary_storage.rst.

[github-actions]

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