repo and snapshots packages filter api add 'maximumVersion' query parameter support

[neolynx]

repo and snapshots packages filter api add 'maximumVersion' query parameter support

example: curl http://localhost:8080/api/repos/test/packages\?maximumVersion\=1

Change-Id: Ie9ffd36146bf017bbb353737f32360f7b73d6b0a

Replaces #1088

Requirements

All new code should be covered with tests, documentation should be updated. CI should pass.

Description of the Change

Checklist

• [ ] unit-test added (if change is algorithm)
• [ ] functional test added/updated (if change is functional)
• [ ] man page updated (if applicable)
• [ ] bash completion updated (if applicable)
• [ ] documentation updated
• [ ] author name in AUTHORS

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 8.69565% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 74.74%. Comparing base (8d09c20) to head (b7e3e3e). Report is 1 commits behind head on master.

Files	Patch %	Lines
api/api.go	8.69%	20 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1285 +/- ## ========================================== - Coverage 74.79% 74.74% -0.05% ========================================== Files 144 144 Lines 16256 16271 +15 ========================================== + Hits 12158 12162 +4 - Misses 3156 3169 +13 + Partials 942 940 -2 ```

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