test: rename_BUFFER to _tagged_fields and add more log files to serializer tests

Author: ryan-gang

internal/test_helpers/fixtures/describe_topic_partitions/pass

@@ -396,7 +396,7 @@ Debug = true
 [tester::#VT6] 
 [tester::#VT6] [Decoder] - .ResponseHeader
 [tester::#VT6] [Decoder]   - .correlation_id (1616512461)
-[tester::#VT6] [Decoder]   - .TAG_BUFFER
+[tester::#VT6] [Decoder]   - ._tagged_fields
 [tester::#VT6] [Decoder] - .ResponseBody
 [tester::#VT6] [Decoder]   - .throttle_time_ms (0)
 [tester::#VT6] [Decoder]   - .topic.length (1)
@@ -427,7 +427,9 @@ Debug = true
 [tester::#EA7] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/meta.properties
 [tester::#EA7] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/.kafka_cleanshutdown
 [tester::#EA7] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/__cluster_metadata-0/partition.metadata
+[tester::#EA7] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/baz-0/partition.metadata
 [tester::#EA7] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/__cluster_metadata-0/00000000000000000000.log
+[tester::#EA7] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/baz-0/00000000000000000000.log
 [tester::#EA7] [Serializer] Finished writing log files to: /tmp/kraft-combined-logs
 [tester::#EA7] $ ./your_program.sh /tmp/server.properties
 [tester::#EA7] Connecting to broker at: localhost:9092
@@ -451,7 +453,7 @@ Debug = true
 [tester::#EA7] 
 [tester::#EA7] [Decoder] - .ResponseHeader
 [tester::#EA7] [Decoder]   - .correlation_id (96710698)
-[tester::#EA7] [Decoder]   - .TAG_BUFFER
+[tester::#EA7] [Decoder]   - ._tagged_fields
 [tester::#EA7] [Decoder] - .ResponseBody
 [tester::#EA7] [Decoder]   - .throttle_time_ms (0)
 [tester::#EA7] [Decoder]   - .topic.length (1)
@@ -495,7 +497,11 @@ Debug = true
 [tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/meta.properties
 [tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/.kafka_cleanshutdown
 [tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/__cluster_metadata-0/partition.metadata
+[tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-0/partition.metadata
+[tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-1/partition.metadata
 [tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/__cluster_metadata-0/00000000000000000000.log
+[tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-0/00000000000000000000.log
+[tester::#KU4] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-1/00000000000000000000.log
 [tester::#KU4] [Serializer] Finished writing log files to: /tmp/kraft-combined-logs
 [tester::#KU4] $ ./your_program.sh /tmp/server.properties
 [tester::#KU4] Connecting to broker at: localhost:9092
@@ -521,7 +527,7 @@ Debug = true
 [tester::#KU4] 
 [tester::#KU4] [Decoder] - .ResponseHeader
 [tester::#KU4] [Decoder]   - .correlation_id (254678266)
-[tester::#KU4] [Decoder]   - .TAG_BUFFER
+[tester::#KU4] [Decoder]   - ._tagged_fields
 [tester::#KU4] [Decoder] - .ResponseBody
 [tester::#KU4] [Decoder]   - .throttle_time_ms (0)
 [tester::#KU4] [Decoder]   - .topic.length (1)
@@ -578,7 +584,15 @@ Debug = true
 [tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/meta.properties
 [tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/.kafka_cleanshutdown
 [tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/__cluster_metadata-0/partition.metadata
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/baz-0/partition.metadata
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/foo-0/partition.metadata
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-0/partition.metadata
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-1/partition.metadata
 [tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/__cluster_metadata-0/00000000000000000000.log
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/baz-0/00000000000000000000.log
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/foo-0/00000000000000000000.log
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-0/00000000000000000000.log
+[tester::#WQ2] [Serializer]   - Wrote file to: /tmp/kraft-combined-logs/pax-1/00000000000000000000.log
 [tester::#WQ2] [Serializer] Finished writing log files to: /tmp/kraft-combined-logs
 [tester::#WQ2] $ ./your_program.sh /tmp/server.properties
 [tester::#WQ2] Connecting to broker at: localhost:9092
@@ -612,7 +626,7 @@ Debug = true
 [tester::#WQ2] 
 [tester::#WQ2] [Decoder] - .ResponseHeader
 [tester::#WQ2] [Decoder]   - .correlation_id (1893237013)
-[tester::#WQ2] [Decoder]   - .TAG_BUFFER
+[tester::#WQ2] [Decoder]   - ._tagged_fields
 [tester::#WQ2] [Decoder] - .ResponseBody
 [tester::#WQ2] [Decoder]   - .throttle_time_ms (0)
 [tester::#WQ2] [Decoder]   - .topic.length (3)