[unit test] GatherClusters and MiniMiner unit tests

Co-authored-by: Murch <[email protected]>
Co-authored-by: theStack <[email protected]>
Co-authored-by: furszy <[email protected]>

Author: 4 people

src/Makefile.test.include

@@ -106,6 +106,7 @@ BITCOIN_TESTS =\
   test/merkle_tests.cpp \
   test/merkleblock_tests.cpp \
   test/miner_tests.cpp \
+  test/miniminer_tests.cpp \
   test/miniscript_tests.cpp \
   test/minisketch_tests.cpp \
   test/multisig_tests.cpp \