Add attachment_name support to create_attachment()

[paulnoirel]

Add the support of an optional attachment_name parameter to data_row.create_attachment() to match JSON creation.

Example:

data_row.create_attachment(attachment_type="IMAGE_OVERLAY", attachment_value="https://storage.googleapis.com/labelbox-sample-datasets/Docs/cir.jpg")

data_row.create_attachment(attachment_type="IMAGE_OVERLAY", attachment_value="https://storage.googleapis.com/labelbox-sample-datasets/Docs/weeds.jpg", attachment_name="Weeds")

Note:

Specific tests were added to verify the creation of an attachment with or without a name.

[vbrodsky]

I personally can approve, also see Chris comments

[paulnoirel]

@vbrodsky Thanks! Additional tests were implemented as per Chris' suggestion.