Merge bitcoin/bitcoin#28650: fuzz: Merge with -set_cover_merge=1

fa858d6 fuzz: Merge with -set_cover_merge=1 (MarcoFalke)

Pull request description:

  This should be less controversial than commit 151a2b1. The overall size of the qa-assets repo is reduced further from 1.9GB to 1.6GB. Also, the runtime to iterate on the resulting folder is reduced further from ~1699s to ~1149s (N=1).

ACKs for top commit:
  murchandamus:
    crACK fa858d6
  dergoegge:
    ACK fa858d6

Tree-SHA512: e23fa93bd48f01d11c551b035004c678bd6d76bc24ac7d0d0a7883060804e6711763cbd0cd0ded3aad3e4c40da764decae81c2703388cc11961def3c89a4f9ba

Author: fanquake

test/fuzz/test_runner.py

@@ -276,7 +276,11 @@ def merge_inputs(*, fuzz_pool, corpus, test_list, src_dir, build_dir, merge_dir)
     for t in test_list:
         args = [
             os.path.join(build_dir, 'src', 'test', 'fuzz', 'fuzz'),
-            '-merge=1',
+            '-set_cover_merge=1',
+            # set_cover_merge is used instead of -merge=1 to reduce the overall
+            # size of the qa-assets git repository a bit, but more importantly,
+            # to cut the runtime to iterate over all fuzz inputs [0].
+            # [0] https://github.com/bitcoin-core/qa-assets/issues/130#issuecomment-1761760866
             '-shuffle=0',
             '-prefer_small=1',
             '-use_value_profile=0',