Add back Offset property for DumpBeamline

The property to manually shift the beamline within the DumpBeamline algorithm was removed with 3de89a93.

While the position of the beamline should always be described correctly by the conditions tag used to process a sample, the property can be useful for misalignment studies and quick checks.

requested review from @raaij

FYI @raaij @peilian @freiss

For #481 I agree that we should use the condition correctly, but for studies related to misalignment for example it is still useful to have this option available.

added RTA label

@dovombru Should this be tested or a further development / discussion is expected?

/ci-test

added ci-test-triggered label

• [2024-01-18 09:20] Validation started with lhcb-master-mr#10160

resolved all threads

mentioned in issue Moore#688 (closed)

approved this merge request

resolved all threads

ci-test is fine, Allen pipeline as well (test-pages and RTX2080 are known issues), MR is approved. Ready to be merged @cagapopo @sponce

merged

mentioned in commit dc224ace

This does not seem to work as expected on the current master; setting DumpBeamline().Offset = (0.19, -0.96) when running HLT1 on the current master does not make any difference to not setting it.

resolved all threads

mentioned in issue #492 (closed)