Add support to build tests with cmake

Summary: This build the test_bitcoin binary. The tests that require code generation are disabled for now.

Test Plan:

ninja
./src/test/test_bitcoin

Check that tests are passing.

Reviewers: #bitcoin_abc, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Subscribers: jasonbcox, teamcity

Differential Revision: https://reviews.bitcoinabc.org/D1023