[fix](paimon) add rest external catalog for gson comaptiblity

[morningman]

Some user from old version will create and persist PaimonRestExternalCatalog instance.

[hello-stephen]

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?

[morningman]

run buildall

[doris-robot]

TPC-H: Total hot run time: 28808 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 747566d5940b9bcf54b41bdad1f583d634aa2b80, data reload: false

------ Round 1 ----------------------------------
============================================
q1	17671	4478	4303	4303
q2	q3	10644	764	531	531
q4	4676	353	270	270
q5	7552	1188	1022	1022
q6	171	175	146	146
q7	781	873	660	660
q8	9296	1452	1300	1300
q9	4731	4738	4735	4735
q10	6769	1877	1658	1658
q11	469	275	248	248
q12	697	568	456	456
q13	17766	4197	3416	3416
q14	235	231	221	221
q15	917	803	785	785
q16	733	736	672	672
q17	726	892	402	402
q18	6024	5414	5249	5249
q19	1141	963	603	603
q20	508	511	393	393
q21	4685	2059	1459	1459
q22	359	316	279	279
Total cold run time: 96551 ms
Total hot run time: 28808 ms

----- Round 2, with runtime_filter_mode=off -----
============================================
q1	4639	4536	4601	4536
q2	q3	1764	2211	1797	1797
q4	875	1181	783	783
q5	4056	4335	4297	4297
q6	183	175	139	139
q7	1799	1660	1530	1530
q8	2575	2768	2521	2521
q9	7426	7467	7408	7408
q10	2617	2806	2395	2395
q11	502	441	402	402
q12	494	587	447	447
q13	4011	4522	3612	3612
q14	286	311	265	265
q15	837	812	817	812
q16	716	767	782	767
q17	1209	1593	1318	1318
q18	7086	6701	6625	6625
q19	873	875	1044	875
q20	2102	2151	1983	1983
q21	3895	3441	3338	3338
q22	503	445	362	362
Total cold run time: 48448 ms
Total hot run time: 46212 ms

[doris-robot]

TPC-DS: Total hot run time: 183572 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 747566d5940b9bcf54b41bdad1f583d634aa2b80, data reload: false

query5	5314	638	514	514
query6	326	225	201	201
query7	4220	466	273	273
query8	340	240	241	240
query9	8749	2737	2741	2737
query10	511	366	318	318
query11	16969	16861	16635	16635
query12	184	126	121	121
query13	1251	447	347	347
query14	6740	3209	2975	2975
query14_1	2805	2780	2765	2765
query15	198	189	174	174
query16	963	456	449	449
query17	1039	678	590	590
query18	2694	430	327	327
query19	207	202	174	174
query20	135	127	124	124
query21	224	144	126	126
query22	5408	6161	5371	5371
query23	17586	17174	16924	16924
query23_1	17301	16776	16697	16697
query24	7080	1611	1217	1217
query24_1	1240	1251	1226	1226
query25	566	475	429	429
query26	1238	263	154	154
query27	2781	464	288	288
query28	4526	1870	1884	1870
query29	810	586	494	494
query30	306	244	219	219
query31	865	732	642	642
query32	82	77	69	69
query33	527	344	299	299
query34	939	936	556	556
query35	631	689	612	612
query36	1072	1164	974	974
query37	126	97	85	85
query38	2956	2916	2877	2877
query39	909	876	844	844
query39_1	832	830	826	826
query40	229	159	149	149
query41	109	57	60	57
query42	103	101	102	101
query43	379	380	347	347
query44	
query45	195	187	181	181
query46	875	995	607	607
query47	2123	2147	2027	2027
query48	306	318	237	237
query49	618	454	374	374
query50	674	274	215	215
query51	4107	4147	4066	4066
query52	109	107	95	95
query53	293	337	286	286
query54	284	266	265	265
query55	86	89	85	85
query56	306	305	298	298
query57	1384	1331	1266	1266
query58	283	273	280	273
query59	2568	2685	2526	2526
query60	324	334	308	308
query61	141	145	147	145
query62	613	595	515	515
query63	302	280	280	280
query64	4800	1295	979	979
query65	
query66	1392	448	350	350
query67	16410	16329	16378	16329
query68	
query69	390	313	279	279
query70	995	957	973	957
query71	340	297	302	297
query72	2747	2712	2401	2401
query73	530	542	333	333
query74	9959	9906	9772	9772
query75	2841	2757	2469	2469
query76	2290	1036	680	680
query77	351	369	302	302
query78	11141	11413	10745	10745
query79	1173	784	600	600
query80	1392	639	534	534
query81	555	277	250	250
query82	1037	144	116	116
query83	353	259	242	242
query84	252	116	100	100
query85	925	472	441	441
query86	425	301	295	295
query87	3122	3096	2995	2995
query88	3499	2652	2648	2648
query89	422	367	357	357
query90	1970	180	163	163
query91	168	153	135	135
query92	79	76	73	73
query93	906	846	519	519
query94	657	344	279	279
query95	572	395	326	326
query96	657	527	227	227
query97	2473	2508	2398	2398
query98	231	222	221	221
query99	1014	955	919	919
Total cold run time: 254414 ms
Total hot run time: 183572 ms

[hello-stephen]

FE UT Coverage Report

Increment line coverage 33.33% (1/3) 🎉
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