LIMS-1856: Fix offset for plates

[ndg63276]

JIRA ticket: LIMS-1856

Summary:

The reservoir for a MRC 2 Drop plate is on the left side, but Synchweb shows it on the right. The database has dropOffsetX=0.5, but this is not used anywhere.

Changes:

• Pull the drop offset values from the database and pass them to the client
• Use the offsets to move the drops around in the well. Drop offset values should be between 0 and 1.

To test:

• Go to any proposal, then add a container to a shipment
• Choose container type MRC 2 Drop, check the drops are on the right and the reservoir on the left
• Create the container, check there are no errors.
• View the created container, check the layout is still the same (this is rendered in a different way and is unchanged)