Add Database kafka schema registry

[BellionBastien]

Description

Adding resource and datasource for newly implemented schema registry ACL on kafka databases.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A: make testacc TESTARGS="-run TestAccCloudProjectDatabaseKafkaSchemaregistryacl_basic"
• Test B: make testacc TESTARGS="-run TestAccCloudProjectDatabaseKafkaSchemaregistryaclsDataSource_basic"

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or issues
• I have added acceptance tests that prove my fix is effective or that my feature works
• New and existing acceptance tests pass locally with my changes
• I ran succesfully go mod vendor if I added or modify go.mod file

[scraly]

The new feature is working, thanks! :-)

Just some remarks, typos and few changes requested.

[scraly]

Thanks, it's OK for me :)
create, update, destroy and the documentation are working.