Move Practitioner signatures & avatars to minIO

[jpye-finch]

Why this is important

There's a 16MB absolute maximum size for database record in our database. The bigger the records are, the slower the database gets. If for whatever reason a country manages to make records more than 16MB, retrieving the record is not possible anymore or the data might corrupt.

Warning

In a real country implementation a data migration failed because some records passed this limit during the migration process.

Description

All binary data should reside in MinIO and not in MongoDB.

This should just be a minio URL

[onnee04]

@jamil314 While creating new local registrar/ national registrar , signature is not getting saved. From edit details view, signature is missing.

missing_signature.mp4

[Zangetsu101]

Signatures are not showing up in certificates

[jamil314]

PR
Feature branch

[onnee04]

fixed.

for avatars,

for signatures,