Refactor building groupby features if require_direct_input

[sbadithe]

• We were looping over the input_features twice because of the call to _features_have_same_path, but I think one traversal should do the trick
• Since the checks for being a DirectFeature and having the same path are so tightly coupled (this function is still doing exactly what it was before), I think it should be okay to move it into one function, but I'm open to ideas here
• Helps reduce complexity, and we can delete the _features_have_same_path function
• In _build_transform_features, removes function call and iterates once over the input_features. This reduces from three traversals to one (closes Reduce traversals over features in _build_transform_features #2402)

[codecov]

Codecov Report

Merging #2400 (4b7b287) into main (84b7cd5) will decrease coverage by 0.00%.
The diff coverage is 94.73%.

@@            Coverage Diff             @@
##             main    #2400      +/-   ##
==========================================
- Coverage   99.45%   99.44%   -0.01%     
==========================================
  Files         331      331              
  Lines       20425    20432       +7     
==========================================
+ Hits        20313    20319       +6     
- Misses        112      113       +1     

Impacted Files	Coverage Δ
featuretools/synthesis/deep_feature_synthesis.py	99.56% <94.73%> (-0.22%)	⬇️

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[rwedge]

LGTM