Multi account Azure VFS #4062

[hansva]

This PR adds multi account support to VFS. You can dynamically add new schema's which are tied to a specific configuration.

This example will create a storage2:// prefix which is linked to storage account knowbistorage2
Following components already support reading/writing to these new prefixes:

File browser/dialog
Transforms:

• list file name
• text file input
• text file output
• parquet output
• avro output
• PGP decrypt stream
• PGP encrypt stream

Actions:

• file exists
• files exists
• Copy files
• Delete File
• Delete Files
• Check if folder is empty
• Create folder
• Create file
• compare folders
• file compare
• evaluate file metrics
• zip file
• unzip file
• write to file
• check files locked
• Decrypt files with PGP
• Encrypt fileswith PGP
• Verify file signature with PGP

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