Refactor resource requests out of Expressions

[jaychia]

1. Expressions no longer have an associated .resource_request() function, only LogicalPlans.
2. @udf(...) no longer allows users to specify resource requests in the UDF
3. The only DataFrame method that allows for custom resource requests is .with_column("x", expr, resource_request=...)

[codecov]

Codecov Report

Merging #528 (e401954) into main (3c99fbb) will decrease coverage by 0.14%.
The diff coverage is 94.28%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #528      +/-   ##
==========================================
- Coverage   72.92%   72.78%   -0.14%     
==========================================
  Files          95       95              
  Lines        7638     7588      -50     
==========================================
- Hits         5570     5523      -47     
+ Misses       2068     2065       -3     

Impacted Files	Coverage Δ
daft/expressions.py	93.17% <ø> (-0.17%)	⬇️
daft/logical/map_partition_ops.py	96.66% <ø> (-0.40%)	⬇️
daft/runners/shuffle_ops.py	93.93% <ø> (-0.18%)	⬇️
daft/udf.py	80.00% <50.00%> (-2.09%)	⬇️
daft/dataframe/dataframe.py	89.88% <100.00%> (+0.04%)	⬆️
daft/execution/logical_op_runners.py	96.44% <100.00%> (ø)
daft/logical/logical_plan.py	79.64% <100.00%> (-0.85%)	⬇️
daft/logical/optimizer.py	95.98% <100.00%> (+0.01%)	⬆️
daft/resource_request.py	95.23% <100.00%> (ø)
daft/runners/pyrunner.py	96.92% <100.00%> (ø)
... and 3 more