[f2dace/staging] `simplify()` simply breaks `velocity_tendendencies` SDFG.

Verified on `f2dace/staging` branch (commit: `34e23611bedee4bed6c2d15e231e03e7faa5465c`).

Before: https://polybox.ethz.ch/index.php/s/mD35Yj68CkwYJst
After: https://polybox.ethz.ch/index.php/s/yRaHt3MfNwKg3Jz

```python
from dace import SDFG
from dace.transformation.interstate import LoopToMap
from dace.transformation.dataflow import MapCollapse

g = SDFG.from_file('~/Downloads/before.sdfgz')
g.simplify(skip=["ArrayElimination", "InlineSDFG"])

g.validate()
'''
output:
/Users/pmz/gitspace/dace/dace/sdfg/validation.py:551: UserWarning: WARNING: Use of uninitialized transient "cfl_clipping" in state "single_state_body_4"
warnings.warn('WARNING: Use of uninitialized transient "%s" in state "%s"' %
/Users/pmz/gitspace/dace/dace/sdfg/validation.py:551: UserWarning: WARNING: Use of uninitialized transient "difcoef" in state "single_state_body"
warnings.warn('WARNING: Use of uninitialized transient "%s" in state "%s"' %
/Users/pmz/gitspace/dace/dace/sdfg/validation.py:551: UserWarning: WARNING: Use of uninitialized transient "levmask" in state "single_state_body"
warnings.warn('WARNING: Use of uninitialized transient "%s" in state "%s"' %
'''

g.view()
'''
Search on the UI to verify that there is a tasklet reading from `tmp_call_18` and assigning to somewhere.
'''

g.simplify(skip=["ArrayElimination", "InlineSDFG"])

g.view()
'''
Search on the UI to verify that `tmp_call_18` is nowhere to be found and that tasklet has been replaced by a constant.
'''
```