Follow the ingest feature flag

https://redmine.teklia.com/issues/8009

The Feature type under src/api/user.ts should be updated to add the new ingest feature flag introduced in backend#1817 (closed).

The router config needs to be updated so that the ImportFromBucket.vue view is only accessible when the ingest flag is enabled.

When the flag is disabled:

• The link to the S3 import page in HeaderActions.vue should be completely hidden.
• The Retry button should be disabled on processes with an S3 mode.