Graveler transform catalog interface

[nopcoder]

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[codecov-io]

Codecov Report

Merging #993 (9c74846) into master (18bf790) will decrease coverage by 0.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #993      +/-   ##
==========================================
- Coverage   44.60%   44.27%   -0.33%     
==========================================
  Files         142      140       -2     
  Lines       11587    11570      -17     
==========================================
- Hits         5168     5123      -45     
- Misses       5765     5798      +33     
+ Partials      654      649       -5     

Impacted Files	Coverage Δ
catalog/mvcc/validate.go	88.23% <0.00%> (-6.21%)	⬇️
catalog/mvcc/cataloger_create_entry.go	94.73% <0.00%> (-5.27%)	⬇️
api/handler.go	70.83% <0.00%> (ø)
gateway/operations/base.go	0.00% <0.00%> (ø)
catalog/mvcc/cataloger_create_multipart_upload.go
catalog/mvcc/cataloger_get_multipart_upload.go
catalog/mvcc/cataloger_delete_multipart_upload.go
gateway/multiparts/tracker.go	0.00% <0.00%> (ø)
gateway/handler.go	58.78% <0.00%> (+0.22%)	⬆️
catalog/mvcc/cataloger_create_repository.go	66.66% <0.00%> (+3.70%)	⬆️
... and 1 more

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[guy-har]

Looks good,
Maybe we should consider returning iterators and not handle pagination in the catalog layer.