Fix ocelot converter to import transverse deflecting cavities

[cr-xu]

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[cr-xu]

Oh, apparently the benchmark test expects to track with ParameterBeam which fails with TDC with only drift-kick-drift method.

We should actually add a linear tracking method for TDC. I'll open another PR for that and wait that to be merged first.

[cr-xu]

Also, I noticed that the Bmad converter is also missing tdc now, I almost can't believe the issue has been open for so long: #354
Should we just resolve that also here?