Merge bitcoin/bitcoin#25589: test: speedup wallet_coinbase_category.py

76a84c0 test: speedup wallet_coinbase_category.py (furszy)

Pull request description:

  No need to create a chain (200 extra blocks), nor use the cache, for it.

Top commit has no ACKs.

Tree-SHA512: beec64ba6c580d475e19700371ae155f4f3d74325879802da83d02f4153a752d5829b8a4ed77e0c893e79cbc26f66389eed90ac2e8b03a59f6c630ee9333355c

Author: MacroFake

test/functional/wallet_coinbase_category.py

@@ -15,6 +15,7 @@
 class CoinbaseCategoryTest(BitcoinTestFramework):
     def set_test_params(self):
         self.num_nodes = 1
+        self.setup_clean_chain = True
 
     def skip_test_if_missing_module(self):
         self.skip_if_no_wallet()