CMIP7: "Unable to apply pseduo constraint..." for landIce variables in ap5

During CMIP7 testing for UKESM1-3-LL, esm-piControl with suite id u-dy847, the following error occurred for a set of variables within the ap5 stream.
```
Unable to apply pseudo constraint `Constraint(coord_values={'pseudo_level': [901, 902, 903, 904, 905, 906, 907, 908, 909, 910, 911, 912, 913, 914, 915, 916, 917, 918, 919, 920, 921, 922, 923, 924, 925]})` to variable cube
```
This affects the following variables:
o landIce.orog.tavg-u-hxy-is.mon.glb
o landIce.prra.tavg-u-hxy-is.mon.glb
o landIce.prsn.tavg-u-hxy-is.mon.glb
o landIce.rsds.tavg-u-hxy-is.mon.glb
o landIce.rsus.tavg-u-hxy-is.mon.glb

The source of this error should be investigated so that these variables can be produced or marked accordingly.

For the request and variable list used when this error occurred, please contact myself.

Start with the request and variable list used for the UKESM1-3-LL esm-piControl test in suite u-dy847, then trace the reported pseudo-constraint failure for the ap5 landIce variables. Contact the issue author for that request and list; done means the affected variables are produced successfully or explicitly marked accordingly.

Written by the indexing model from the issue text.