test: fix tests incompatible with default peerblockfilters=1

The PR enables peerblockfilters=1 by default, which also enables
blockfilterindex. This is incompatible with -reindex-chainstate.

Add -blockfilterindex=0 to tests that use -reindex-chainstate to
ensure they can run successfully with the new default.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: PastaPastaPasta

test/functional/feature_reindex.py

@@ -25,7 +25,7 @@ def reindex(self, justchainstate=False, txindex=0):
         self.generatetoaddress(self.nodes[0], 3, self.nodes[0].get_deterministic_priv_key().address)
         blockcount = self.nodes[0].getblockcount()
         self.stop_nodes()
-        extra_args = [["-reindex-chainstate", "-txindex=0"]] if justchainstate else [["-reindex", f"-txindex={txindex}"]]
+        extra_args = [["-reindex-chainstate", "-txindex=0", "-blockfilterindex=0"]] if justchainstate else [["-reindex", f"-txindex={txindex}"]]
         self.start_nodes(extra_args)
         assert_equal(self.nodes[0].getblockcount(), blockcount)  # start_node is blocking on reindex
         self.log.info("Success")

test/functional/feature_unsupported_utxo_db.py

@@ -53,7 +53,7 @@ def run_test(self):
         )
 
         self.log.info("Drop legacy utxo db")
-        self.start_node(1, extra_args=["-reindex-chainstate", "-txindex=0"])
+        self.start_node(1, extra_args=["-reindex-chainstate", "-txindex=0", "-blockfilterindex=0"])
         assert_equal(self.nodes[1].getbestblockhash(), block)
         assert_equal(self.nodes[1].gettxoutsetinfo()["total_amount"], 500)