Scene.__getitem__ not "greedy" enough

[BENR0]

Describe the bug
Currently it is possible to get a dataset identified only by name with a more concise DataID with name and for example resolution. This is also relevant for DataID in Scene testing and dataset deletion (see code examples below).
A __setitem__ operation with a more specific DataID does not overwrite the dataset with a less specific DataID which is good but the DataID added to the dependency_tree is wrong.

To Reproduce

from satpy.tests.utils import make_dataid
scene = Scene()
scene['1'] = ds1 = xr.DataArray(np.arange(5))
dataid = make_dataid(name='1', resolution=2000) 
print(dataid in scene) # => True should be False

scene[dataid] # => returns ds1 but should return KeyError

del scene[dataid]
print(scene) # => should not be empty


scene['1'] = ds1 = xr.DataArray(np.arange(5))
print(scene._dependency_tree)

scene[dataid] = ds2 = xr.DataArray(np.arange(5, 10))
print(scene._dependency_tree)

Expected behavior
See code example.

Environment Info:

• OS: Linux
• Satpy Version: main branch
• PyResample Version: 1.26.0

Additional context
As far as I can see this behaviour is due to the get_key method in DatasetDict (

satpy/satpy/dataset/data_dict.py

Line 142 in cfe4fa9

def get_key(self, match_key, num_results=1, best=True, **dfilter):

) not being "greedy" enough.