[SystemZ] Add missing (dis-)assembly tests. (#88498)

### Assembly Tests
This adds assembly tests for 
```
lcdfr, lndfr, lpdfr
```

### Disassembly Tests
This also adds a number of disassembly tests for the following
menmonics:
```
cgit, cgrt, cit, clfit, clgit, clgrt, clgt, clrt, clt, crt, lcdfr, lndfr, lpdfr
```
For `cutfu` / `cu12`, it also adds a check for bad register choice.