DPL-080 Check plate existence in Sequencescape

[pjvv]

User story
Biosero would like to check the existence of a destination plate before starting a run.

Who are the primary contacts for this story
@andrewsparkes
@emrojo

Acceptance criteria
To be considered successful the solution must allow:

• forward requests to SS to check for plate existence
• return with the barcode and a boolean whether the plate exists in SS

Dependencies
This story is blocked by the following dependencies:

• #<issue_no.>
• sanger/#<issue_no.>

References
This story has a non-blocking relationship with:

• #<issue_no.>
• sanger/#<issue_no.>

Additional context
Add any other context or screenshots about the feature request here.