Add namespace, before, and after to searchAPI

[wslulciuc]

Problem

The searchAPI does not support filtering search results by namespace or date. See related issue #2550

Solution

This PR adds for search results by namespace or date using the following query parameters:

• namespace - will match jobs or datasets within the given namespace.
• before - will match jobs or datasets before YYYY-MM-DD.
• after - will match jobs or datasets after YYYY-MM-DD.

Checklist

• You've signed-off your work
• Your changes are accompanied by tests (if relevant)
• Your change contains a small diff and is self-contained
• You've updated any relevant documentation (if relevant)
• You've included a one-line summary of your change for the CHANGELOG.md (Depending on the change, this may not be necessary).
• You've versioned your .sql database schema migration according to Flyway's naming convention (if relevant)
• You've included a header in any source code files (if relevant)

[codecov]

Codecov Report

Merging #2553 (55ad2a7) into feature/filter-search-by-namespace-or-date (50443ab) will not change coverage.
The diff coverage is n/a.

@@                              Coverage Diff                              @@
##             feature/filter-search-by-namespace-or-date    #2553   +/-   ##
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  Coverage                                         83.26%   83.26%           
  Complexity                                         1286     1286           
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  Files                                               243      243           
  Lines                                              5934     5934           
  Branches                                            279      279           
=============================================================================
  Hits                                               4941     4941           
  Misses                                              846      846           
  Partials                                            147      147           

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