Add SQLiteDatabase and SQLiteBatch dummy classes

Summary:
This is a backport of core#19077 [3/26]
https://github.com/bitcoin/bitcoin/pull/19077/commits/7577b6e1c88a1a7b45ecf5c7f1735bae6f5a82bf

Depends on D10472

Note: I had to comment out m_mock to avoid triggering compiler warnings about unused variables.

Test Plan:

cmake .. -GNinja -DCMAKE_C_COMPILER=clang-12 -DCMAKE_CXX_COMPILER=clang++-12 -DENABLE_CLANG_TIDY=ON
ninja

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10542