c/types: fixed to string operators for some transactional types

Some of the operators were incorrectly declared while all of them were
lacking definition

Signed-off-by: Michal Maslanka <michal@redpanda.com>

src/v/cluster/types.cc

@@ -1177,6 +1177,39 @@ operator<<(std::ostream& o, const update_partition_replicas_cmd_data& data) {
     return o;
 }
 
+std::ostream& operator<<(std::ostream& o, const fetch_tx_reply& r) {
+    fmt::print(
+      o,
+      "{{ec: {}, pid: {}, last_pid: {}, tx_seq: {}, timeout_ms: {}, status: "
+      "{}, partitions: {}, groups: {}}}",
+      r.ec,
+      r.pid,
+      r.last_pid,
+      r.tx_seq,
+      r.timeout_ms.count(),
+      r.status,
+      r.partitions,
+      r.groups);
+    return o;
+}
+
+std::ostream& operator<<(std::ostream& o, const fetch_tx_reply::tx_group& g) {
+    fmt::print(o, "{{etag: {}, group_id: {}}}", g.etag, g.group_id);
+    return o;
+}
+
+std::ostream&
+operator<<(std::ostream& o, const fetch_tx_reply::tx_partition& p) {
+    fmt::print(
+      o,
+      "{{etag: {}, ntp: {}, revision: {}}}",
+      p.etag,
+      p.ntp,
+      p.topic_revision);
+
+    return o;
+}
+
 } // namespace cluster
 
 namespace reflection {

src/v/cluster/types.h

@@ -431,7 +431,7 @@ struct fetch_tx_reply
 
         friend bool operator==(const tx_group&, const tx_group&) = default;
 
-        friend std::ostream& operator<<(std::ostream& o, const tx_partition& r);
+        friend std::ostream& operator<<(std::ostream& o, const tx_group& r);
 
         auto serde_fields() { return std::tie(group_id, etag); }
     };