Added a support for search (search_after parameter)

[nathaliellenaa]

Description

Added sync and async sample that uses search_after parameter for #337.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.45%. Comparing base (ba715b9) to head (08bfab8).
Report is 77 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #859      +/-   ##
==========================================
- Coverage   71.95%   70.45%   -1.50%     
==========================================
  Files          91      125      +34     
  Lines        8001     9311    +1310     
==========================================
+ Hits         5757     6560     +803     
- Misses       2244     2751     +507     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[dblock]

This doesn't look like an aws sample, so let's put it into a samples/search folder. It would be good to have a _sync and an _async sample, too.

[dblock]

One more thing. Maybe we can write a sample that inserts many records and paginates through N pages instead until there are no more results? That seems more useful than a synthetic example with just 3 values.