Codim 0 mixed assembly: Spatial coordinate without constant/coefficient

### Summarize the issue

Seems like ufl is not picking up meshes from spatial coordinate.
First form has a constant from parent mesh, and it compiles.
Second form only has spatial coordinate from parent and fails in signature computation

### How to reproduce the bug

Run example below with main branch

### Minimal Example (Python)

```Python
import dolfinx
import numpy as np
import ufl
from mpi4py import MPI

mesh = dolfinx.mesh.create_unit_square(
MPI.COMM_WORLD, 4, 2, ghost_mode=dolfinx.mesh.GhostMode.shared_facet)

tdim = mesh.topology.dim
fdim = tdim - 1
mesh.topology.create_entities(fdim)

# Get number of cells on process
cell_map = mesh.topology.index_map(tdim)
num_cells = cell_map.size_local + cell_map.num_ghosts

# Create markers for each size of the interface
cell_values = np.ones(num_cells, dtype=np.int32)
cell_values[dolfinx.mesh.locate_entities(
mesh, tdim, lambda x: x[0] <= 0.5 + 1e-13)] = 2
ct = dolfinx.mesh.meshtags(mesh, tdim, np.arange(
num_cells, dtype=np.int32), cell_values)

submesh, sub_cell_to_parent, sub_vertex_to_parent, _ = dolfinx.mesh.create_submesh(mesh, ct.dim, ct.find(2))

mesh_to_submesh = np.full(num_cells, -1)
mesh_to_submesh[sub_cell_to_parent] = np.arange(len(sub_cell_to_parent), dtype=np.int32)

x = ufl.SpatialCoordinate(mesh)
d = dolfinx.fem.Constant(mesh, 1.0)
entity_maps = {mesh._cpp_object: np.array(sub_cell_to_parent, dtype=np.int32)}
dolfinx.fem.form(d * x[0] * ufl.dx(domain=submesh), entity_maps=entity_maps)
dolfinx.fem.form(x[0] * ufl.dx(domain=submesh), entity_maps=entity_maps)
```

### Output (Python)

```bash
Traceback (most recent call last):
File "/root/shared/mwe_2.py", line 34, in
dolfinx.fem.form(x[0] * ufl.dx(domain=submesh), entity_maps=entity_maps)
File "/usr/local/dolfinx-real/lib/python3.10/dist-packages/dolfinx/fem/forms.py", line 249, in form
return _create_form(form)
File "/usr/local/dolfinx-real/lib/python3.10/dist-packages/dolfinx/fem/forms.py", line 244, in _create_form
return _form(form)
File "/usr/local/dolfinx-real/lib/python3.10/dist-packages/dolfinx/fem/forms.py", line 186, in _form
ufcx_form, module, code = jit.ffcx_jit(
File "/usr/local/dolfinx-real/lib/python3.10/dist-packages/dolfinx/jit.py", line 51, in mpi_jit
return local_jit(*args, **kwargs)
File "/usr/local/dolfinx-real/lib/python3.10/dist-packages/dolfinx/jit.py", line 201, in ffcx_jit
r = ffcx.codegeneration.jit.compile_forms([ufl_object], options=p_ffcx, **p_jit)
File "/usr/local/lib/python3.10/dist-packages/ffcx/codegeneration/jit.py", line 225, in compile_forms
module_name = "libffcx_forms_" + ffcx.naming.compute_signature(
File "/usr/local/lib/python3.10/dist-packages/ffcx/naming.py", line 39, in compute_signature
object_signature += ufl_object.signature()
File "/usr/local/lib/python3.10/dist-packages/ufl/form.py", line 445, in signature
self._compute_signature()
File "/usr/local/lib/python3.10/dist-packages/ufl/form.py", line 698, in _compute_signature
self._signature = compute_form_signature(self, self._compute_renumbering())
File "/usr/local/lib/python3.10/dist-packages/ufl/algorithms/signature.py", line 137, in compute_form_signature
terminal_hashdata = compute_terminal_hashdata(integrands, renumbering)
File "/usr/local/lib/python3.10/dist-packages/ufl/algorithms/signature.py", line 74, in compute_terminal_hashdata
data = expr._ufl_signature_data_(renumbering)
File "/usr/local/lib/python3.10/dist-packages/ufl/geometry.py", line 105, in _ufl_signature_data_
return (self._ufl_class_.__name__,) + self._domain._ufl_signature_data_(renumbering)
File "/usr/local/lib/python3.10/dist-packages/ufl/domain.py", line 120, in _ufl_signature_data_
return ("Mesh", renumbering[self], self._ufl_coordinate_element)
KeyError: Mesh(blocked element (Basix element (P, triangle, 1, gll_warped, unset, False, float64, []), (2,)), 0)
```

### Version

main branch

### DOLFINx git commit

1ccffb0aa545634ea6e160236a7b043dc2a7fdd2

### Installation

Using docker with `ghcr.io/fenics/dolfinx/dolfinx:nightly`

### Additional information

_No response_