[native] add function to initialize DatabaseQueryExecutor

Summary:
Implementing approach described in ENG-1974.
This function will be called separately in iOS and Android so this time separating function from it's call to make it easier for reviewers.

Test Plan:

1. Make it possible to throw and exception on migrate() function on demand.
2. Call this function.
3. Build the app for both platforms
4. Check if:
5. getQueryExecutor() works properly -> db status = WORKABLE
6. getQueryExecutor() throws exception and there is nothing in store -> db status = 'FIRST_FAILURE' and app is terminated
7. getQueryExecutor() throws exception and there WORKABLE -> db status = 'FIRST_FAILURE' and app is terminated
8. getQueryExecutor() throws exception and there FIRST_FAILURE -> db status = 'SECOND_FAILURE' and app proceed
9. getQueryExecutor() throws exception and there SECOND_FAILURE -> db status = 'SECOND_FAILURE' and app proceed

Reviewers: marcin, tomek

Reviewed By: marcin, tomek

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D5991