s3: Force a prefix removal using a special header

[vadmeste]

Description

An S3 client can send x-minio-force-delete to remove a prefix.

Motivation and Context

Help the user to quickly remove a prefix, this is a MinIO extension

How to test this PR?

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#!/usr/bin/env python3

def remove_prefix(self, bucket, prefix):
    if bucket is None or bucket == "":
        raise Exception('bucket name is invalid')
    if prefix is None or prefix == "":
        raise Exception('prefix name is invalid')
    self._execute('DELETE', bucket, prefix, headers={'x-minio-force-delete': 'true'})

from minio import Minio
setattr(Minio, "remove_prefix", remove_prefix)

minioClient = Minio(
        'localhost:9000',
        access_key='minio',
        secret_key='minio123',
        secure=False
        )

minioClient.remove_prefix('testbucket', 'prefix/')

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Documentation updated
• Unit tests added/updated

[minio-trusted]

Mint Automation

Test	Result
mint-large-bucket.sh	✔️
mint-fs.sh	✔️
mint-gateway-s3.sh	✔️
mint-erasure.sh	✔️
mint-dist-erasure.sh	✔️
mint-zoned.sh	✔️
mint-gateway-nas.sh	✔️
mint-compress-encrypt-dist-erasure.sh	✔️
Deleting image on docker hub
Deleting image locally