LIMS-538: Remove the 'Centring Method' column from creating an MX container

[ndg63276]

JIRA ticket: LIMS-538

Summary:

We no longer need users to select between optical and diffraction-based centring. We can leave that field as NULL and agamemnon will always default to diffraction. XChem users can choose optical centring via the CSV uploader if so desired.
I have also added a column for the sample SMILES code as that can be used in processing going forward.

Changes:

• Remove Centring Method column from the UDC tab
• Add SMILES Code column to the Extra Fields tab, with regex validation
• Make 'Stepped transmission' experiment kind only available to staff
• Only allow energies above 1501eV, to avoid confusion between eV and keV

To test:

• Go to a proposal (eg mx23694), make a new shipment
• Make a new container, check the Centring Method column is not displayed on the UDC tab
• Check the SMILES code column appears on the extra fields tab, and allows letters, numbers, some punctuation (.-=#$:/) but not others (eg £)
• Check the energy field only allows values greater than 1501 eV
• Check once you create a container, a new 'Create Container' page is shown, with all the fields put back to blank
• Check you can edit the samples in a container once it has been created, notably the SMILES code field
• Check in the database that the DiffractionPlan.centringMethod field is NULL, and the BLSample.SMILES field is set correctly
• Check both Centring Method and SMILES code can be edited by viewing an individual sample