Merge #19672: build: make clean removes .gcda and .gcno files from fuzz directory

90bd476ea6 build: make clean removes .gcda and .gcno files from fuzz directory (eugene)

Pull request description:

  I believe these should also be deleted upon invoking `make clean`. It also garbles the coverage file if you try to fuzz the same harness again.

ACKs for top commit:
  practicalswift:
    ACK 90bd476ea6 -- patch looks correct
  hebasto:
    ACK 90bd476ea6, tested with hints from #12602 and #18107.
  darosior:
    ACK 90bd476ea6

Tree-SHA512: 4b2eb664f64d18bc0385c5a0040b0b9fa6fe470c941ae39c7cb4544c4283427a8d4985517475fe0295c3ab2794b9a2ad4f76b6a443c05d846c97c966add87ca9

src/Makefile.test.include

@@ -1208,7 +1208,7 @@ nodist_test_test_bitcoin_SOURCES = $(GENERATED_TEST_FILES)
 
 $(BITCOIN_TESTS): $(GENERATED_TEST_FILES)
 
-CLEAN_BITCOIN_TEST = test/*.gcda test/*.gcno $(GENERATED_TEST_FILES) $(BITCOIN_TESTS:=.log)
+CLEAN_BITCOIN_TEST = test/*.gcda test/*.gcno test/fuzz/*.gcda test/fuzz/*.gcno $(GENERATED_TEST_FILES) $(BITCOIN_TESTS:=.log)
 
 CLEANFILES += $(CLEAN_BITCOIN_TEST)