Provide meta to result of complex _apply_offset

[charlesbluca]

In _apply_offset, we sometimes use dd.from_delayed() to construct the resulting dataframe, but do not explicitly pass a meta. This means that in some cases, we end up implicitly changing the meta of the input dataframe, which can cause issues later on if it doesn't match up with the computed dataframe (the cause of the test failures in #408).

This PR passes the input dataframe's meta to dd.from_delayed() so that it is preserved through the operation.

[codecov-commenter]

Codecov Report

Merging #420 (9fb1572) into main (0372ebc) will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #420      +/-   ##
==========================================
+ Coverage   89.02%   89.18%   +0.15%     
==========================================
  Files          69       69              
  Lines        3327     3328       +1     
  Branches      654      654              
==========================================
+ Hits         2962     2968       +6     
+ Misses        296      287       -9     
- Partials       69       73       +4     

Impacted Files	Coverage Δ
dask_sql/physical/rel/logical/limit.py	92.85% <100.00%> (ø)
dask_sql/physical/utils/map.py	100.00% <100.00%> (ø)
dask_sql/_version.py	34.00% <0.00%> (+1.44%)	⬆️

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