Merge #17452: test: update fuzz directory in .gitignore

77ef48d532 gitignore: ignore fuzz binaries, remove test_bitcoin_fuzzy (Jon Atack)

Pull request description:

  The fuzzing gitignores haven't been updated since a4153e2 in 2016 that added an initial simple fuzzing framework.

  This commit:
  - removes `src/test/test_bitcoin_fuzzy` which is no longer used in favor of `src/test/fuzz`
  - ignores the `src/test/fuzz` directory, then un-ignores files in it with an extension, to de-clutter the git status from all the generated binary files.

  Co-authored-by: Karl-Johan Alm <karljohan-alm@garage.co.jp>

ACKs for top commit:
  practicalswift:
    ACK 77ef48d532
  MarcoFalke:
    ACK 77ef48d532

Tree-SHA512: 1fef4fbe88ded1ecf039205ace0da2abbaabcaae6ac6674eb29f84ae2f2fc560c1341e75e664cc2e243aca5767253756dba73b90ef32c7dd07c7c638abe6daf0

.gitignore

@@ -7,8 +7,9 @@ src/bitcoind
 src/bitcoin-cli
 src/bitcoin-tx
 src/bitcoin-wallet
+src/test/fuzz
+!src/test/fuzz/*.*
 src/test/test_bitcoin
-src/test/test_bitcoin_fuzzy
 src/qt/test/test_bitcoin-qt
 
 # autoreconf