[REVIEW] Fix from_dict backend dispatch to match upstream dask

[galipremsagar]

Description

This PR fixes a failure being observed in dask upstream: dask/dask#9676

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

Base: 88.25% // Head: 88.22% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (5913773) compared to base (782fba3).
Patch has no changes to coverable lines.

Additional details and impacted files

@@               Coverage Diff                @@
##           branch-22.12   #12203      +/-   ##
================================================
- Coverage         88.25%   88.22%   -0.04%     
================================================
  Files               137      137              
  Lines             22571    22571              
================================================
- Hits              19921    19914       -7     
- Misses             2650     2657       +7     

Impacted Files	Coverage Δ
python/dask_cudf/dask_cudf/backends.py	85.17% <ø> (ø)
python/cudf/cudf/core/column/lists.py	92.78% <0.00%> (-0.97%)	⬇️
python/cudf/cudf/core/column/decimal.py	91.35% <0.00%> (-0.55%)	⬇️
python/cudf/cudf/core/tools/datetimes.py	84.19% <0.00%> (-0.31%)	⬇️
python/cudf/cudf/core/groupby/groupby.py	91.30% <0.00%> (-0.21%)	⬇️
python/cudf/cudf/core/column/string.py	88.52% <0.00%> (-0.13%)	⬇️
python/cudf/cudf/core/dataframe.py	93.59% <0.00%> (-0.05%)	⬇️

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[rjzamora]

Thank you for fixing this @galipremsagar and thanks for merging @ajschmidt8!