[web] Add SQLite query executor tests

Summary:
Add some tests to make sure the executor works.

https://linear.app/comm/issue/ENG-10334/update-jsi-and-web-worker-code-to-support-new-db-operations

Depends on D14449

Test Plan: Tests

Reviewers: kamil, bartek

Reviewed By: kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D14450