Migrate Brain models to non-Google Drive location

[brimoor]

The models used by the Brain are currently stored in Google Drive as public files, cf.

fiftyone-brain/fiftyone/brain/models/cache/manifest.json

Lines 10 to 12 in 7f6572c

	"config": {
	"google_drive_id": "1SIO9XreK0w1ja4EuhBWcR10CnWxCOsom"
	}

.

This works for modest usage, but we've run into issues with throttling of bandwidth from Google Drive, resulting in rejected downloads in some cases, so as our userbase grows, we'll need to find another home for the Brain models.

Some options:

• host on our website? (need to research GoDaddy bandwidth limits; this is probably even worse than Google Drive...)
• host as publicly available objects in GCS (as this will cost us $$$ to host, need to research basic safeguards to prevent download abuse)
• others?