Closes: #11781: Add support for Amazon S3 remote data sources (#11986)

* Add boto3 as a dependency

* Add Amazon S3 backend for remote data sources

* Update docs to include Amazon S3 support

netbox/core/choices.py

@@ -10,10 +10,12 @@ from utilities.choices import ChoiceSet
 class DataSourceTypeChoices(ChoiceSet):
     LOCAL = 'local'
     GIT = 'git'
+    AMAZON_S3 = 'amazon-s3'
 
     CHOICES = (
         (LOCAL, _('Local'), 'gray'),
         (GIT, _('Git'), 'blue'),
+        (AMAZON_S3, _('Amazon S3'), 'blue'),
     )