[fix]: fix the show backends output column mismatch

[Baymine]

What problem does this PR solve?

fix the show backends column output mismatch introduced from #60210

Issue Number: close #xxx

Related PR: #xxx

Problem Summary:

Release note

None

Check List (For Author)

• Test

  • Regression test
  • Unit Test
  • Manual test (add detailed scripts or steps below)
  • No need to test or manual test. Explain why:
    • This is a refactor/code format and no logic has been changed.
    • Previous test can cover this change.
    • No code files have been changed.
    • Other reason

• Behavior changed:

  • No.
  • Yes.

• Does this need documentation?

  • No.
  • Yes.

Check List (For Reviewer who merge this PR)

• Confirm the release note
• Confirm test cases
• Confirm document
• Add branch pick label

[Thearas]

Thank you for your contribution to Apache Doris.
Don't know what should be done next? See How to process your PR.

Please clearly describe your PR:

1. What problem was fixed (it's best to include specific error reporting information). How it was fixed.
2. Which behaviors were modified. What was the previous behavior, what is it now, why was it modified, and what possible impacts might there be.
3. What features were added. Why was this function added?
4. Which code was refactored and why was this part of the code refactored?
5. Which functions were optimized and what is the difference before and after the optimization?

[Baymine]

run buildall

[doris-robot]

TPC-H: Total hot run time: 27696 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 34cea531f9e41444094567d2122f09c412bffd34, data reload: false

------ Round 1 ----------------------------------
============================================
q1	17630	4521	4291	4291
q2	q3	10653	762	521	521
q4	4679	360	256	256
q5	7557	1205	1033	1033
q6	175	172	146	146
q7	774	827	678	678
q8	9379	1475	1396	1396
q9	4903	4737	4680	4680
q10	6334	1926	1646	1646
q11	478	265	234	234
q12	745	569	473	473
q13	18040	2936	2176	2176
q14	228	232	225	225
q15	931	794	804	794
q16	762	727	690	690
q17	711	848	427	427
q18	5991	5471	5248	5248
q19	1155	1003	615	615
q20	516	497	400	400
q21	4576	2254	1494	1494
q22	383	312	273	273
Total cold run time: 96600 ms
Total hot run time: 27696 ms

----- Round 2, with runtime_filter_mode=off -----
============================================
q1	4732	4575	4554	4554
q2	q3	3862	4344	3833	3833
q4	862	1200	815	815
q5	4071	4372	4439	4372
q6	190	173	142	142
q7	1753	1666	1578	1578
q8	2515	2844	2535	2535
q9	7537	7417	7510	7417
q10	3751	3968	3559	3559
q11	495	429	417	417
q12	490	602	444	444
q13	2697	3368	2372	2372
q14	288	301	287	287
q15	856	839	823	823
q16	711	793	737	737
q17	1202	1472	1388	1388
q18	7201	6996	6763	6763
q19	953	936	889	889
q20	2154	2203	2019	2019
q21	4013	3438	3399	3399
q22	467	460	378	378
Total cold run time: 50800 ms
Total hot run time: 48721 ms

[doris-robot]

TPC-DS: Total hot run time: 153910 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpcds-tools
TPC-DS sf100 test result on commit 34cea531f9e41444094567d2122f09c412bffd34, data reload: false

query5	4344	633	512	512
query6	329	231	208	208
query7	4224	471	267	267
query8	338	263	234	234
query9	8651	2760	2754	2754
query10	524	374	345	345
query11	7374	5793	5565	5565
query12	189	138	124	124
query13	1266	451	346	346
query14	5778	3873	3616	3616
query14_1	2843	2853	2798	2798
query15	211	195	183	183
query16	983	496	452	452
query17	967	720	617	617
query18	2452	443	363	363
query19	213	210	186	186
query20	137	131	130	130
query21	225	151	125	125
query22	4756	4780	4762	4762
query23	16748	16007	15856	15856
query23_1	15930	15790	15812	15790
query24	7503	1651	1286	1286
query24_1	1315	1276	1308	1276
query25	558	497	457	457
query26	2461	271	156	156
query27	2821	474	290	290
query28	4514	1874	1862	1862
query29	874	576	464	464
query30	313	240	213	213
query31	1362	1287	1207	1207
query32	80	79	72	72
query33	523	330	278	278
query34	923	906	562	562
query35	642	668	612	612
query36	1083	1139	1001	1001
query37	138	99	88	88
query38	2940	2958	2907	2907
query39	908	875	840	840
query39_1	823	832	816	816
query40	233	151	136	136
query41	61	61	59	59
query42	307	308	304	304
query43	245	261	221	221
query44	
query45	196	191	183	183
query46	869	1003	610	610
query47	2139	2136	2058	2058
query48	333	319	230	230
query49	636	465	378	378
query50	686	275	218	218
query51	4149	4131	4099	4099
query52	297	310	294	294
query53	299	339	288	288
query54	313	312	282	282
query55	102	97	88	88
query56	329	335	317	317
query57	1362	1372	1293	1293
query58	300	292	278	278
query59	1425	1435	1298	1298
query60	353	329	326	326
query61	154	150	147	147
query62	617	596	549	549
query63	313	279	274	274
query64	4927	1273	1009	1009
query65	
query66	1408	459	354	354
query67	16313	16628	16432	16432
query68	
query69	390	310	277	277
query70	992	903	960	903
query71	345	334	341	334
query72	2974	2838	2617	2617
query73	546	549	329	329
query74	9956	9912	9893	9893
query75	2837	2782	2513	2513
query76	2290	1019	696	696
query77	374	425	316	316
query78	11204	11362	10665	10665
query79	3168	795	592	592
query80	1769	636	554	554
query81	590	279	247	247
query82	978	150	119	119
query83	338	260	245	245
query84	289	116	95	95
query85	903	484	441	441
query86	493	309	296	296
query87	3124	3136	3015	3015
query88	3542	2668	2661	2661
query89	425	367	350	350
query90	2086	186	188	186
query91	163	160	137	137
query92	85	75	69	69
query93	1604	832	503	503
query94	657	327	289	289
query95	593	404	321	321
query96	641	526	230	230
query97	2523	2506	2432	2432
query98	253	218	224	218
query99	1013	1009	890	890
Total cold run time: 237690 ms
Total hot run time: 153910 ms

[hello-stephen]

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