fix(eap): Ensure count has type integer

[Zylphrex]

Snuba started returning Int64 instead of UInt64 for count() on EAP through SnQL. Make sure to support that correctly.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #81031 +/- ## ========================================== - Coverage 78.49% 78.48% -0.02% ========================================== Files 7210 7210 Lines 319517 319517 Branches 43983 43983 ========================================== - Hits 250800 250760 -40 - Misses 62328 62357 +29 - Partials 6389 6400 +11 ```