test: feature_init: tweak all .ldb files of a certain type

This part of the test sporadically fails on CI infrastructure. Instead
of perturbing a single .ldb file of each type, move all .ldb files of a
given type to ensure a bad startup.

test/functional/feature_init.py

@@ -152,8 +152,9 @@ class InitStressTest(BitcoinTestFramework):
         }
 
         for file_patt, err_fragment in files_to_disturb.items():
-            target_file = list(node.chain_path.glob(file_patt))[0]
+            target_files = list(node.chain_path.glob(file_patt))
 
+            for target_file in target_files:
                 self.log.info(f"Tweaking file to ensure failure {target_file}")
                 bak_path = str(target_file) + ".bak"
                 target_file.rename(bak_path)
@@ -176,8 +177,11 @@ class InitStressTest(BitcoinTestFramework):
                 match=ErrorMatch.PARTIAL_REGEX,
             )
 
-            self.log.info(f"Restoring file from {bak_path} and restarting")
+            for target_file in target_files:
+                bak_path = str(target_file) + ".bak"
+                self.log.debug(f"Restoring file from {bak_path} and restarting")
                 Path(bak_path).rename(target_file)
+
             check_clean_start()
             self.stop_node(0)