enhance(pagination)!: remove total results calculation for performance improvement

[ecrupper]

Rather than calculate pagination logic on total count, we can leverage whether or not the current page of results is equal to the per-page setting.

This will create some awkward situations where the total results are a multiple of the per-page setting, but we can handle this in the UI more gracefully (there will need to be a follow up PR in that repo).

However, the awkward handling is worth the performance improvement. Using telemetry, we have been able to discover that the most expensive DB queries in the application are all the counts. They are not necessary for functionality and are notoriously not performant. This change should make almost every list API far more snappy.

[codecov]

Codecov Report

Attention: Patch coverage is 52.13675% with 56 lines in your changes missing coverage. Please review.

Project coverage is 56.81%. Comparing base (cf8aea3) to head (3a6a89b).

Files with missing lines	Patch %	Lines
api/pagination.go	0.00%	3 Missing ⚠️
secret/native/list.go	25.00%	3 Missing ⚠️
api/build/graph.go	0.00%	2 Missing ⚠️
api/build/list_org.go	0.00%	2 Missing ⚠️
api/build/list_repo.go	0.00%	2 Missing ⚠️
api/build/update.go	0.00%	2 Missing ⚠️
api/hook/list.go	0.00%	2 Missing ⚠️
api/log/list_build.go	0.00%	2 Missing ⚠️
api/pipeline/list.go	0.00%	2 Missing ⚠️
api/repo/list.go	0.00%	2 Missing ⚠️
... and 24 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1254      +/-   ##
==========================================
+ Coverage   56.59%   56.81%   +0.22%     
==========================================
  Files         629      629              
  Lines       35645    35411     -234     
==========================================
- Hits        20172    20120      -52     
+ Misses      14792    14662     -130     
+ Partials      681      629      -52     

Files with missing lines	Coverage Δ
database/build/list.go	89.28% <100.00%> (+14.28%)	⬆️
database/hook/list.go	89.65% <100.00%> (+13.97%)	⬆️
database/log/list.go	90.00% <100.00%> (+13.68%)	⬆️
database/pipeline/list.go	81.25% <100.00%> (+11.25%)	⬆️
database/repo/list.go	90.90% <100.00%> (+12.86%)	⬆️
database/schedule/list.go	89.65% <100.00%> (+13.97%)	⬆️
database/schedule/list_active.go	90.00% <100.00%> (+13.68%)	⬆️
database/secret/list.go	90.32% <100.00%> (+13.39%)	⬆️
database/service/list.go	86.95% <100.00%> (+15.98%)	⬆️
database/step/list.go	86.95% <100.00%> (+15.98%)	⬆️
... and 35 more