1. Add the 100 times test when the private key is generated by the random number;
2. Add the bt components to the unit-test-app/config directory.
3. Added the bt unit test case to CI.
For some test configurations, not all tests need to be run. This
change allows adding a comment in the configuration file of the
following form:
unit-test-app makefile will use it to determine which components to
build. If the comment is not present, all components will be built
(TESTS_ALL=1).
Also add test configuration for libsodium. It is a separate test
configuration due to the large binary size generated when building
libsodium tests.
