branch-4.0: [Fix](job) add thread num config for streaming task exec #57230

[github-actions]

Cherry-picked from #57230

[Thearas]

Thank you for your contribution to Apache Doris.
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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?

[Thearas]

run buildall

[doris-robot]

ClickBench: Total hot run time: 30.66 s

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 69a629568e57a05f90d283d5f04eabf3447018f4, data reload: true

query1	0.04	0.04	0.03
query2	0.13	0.04	0.03
query3	0.27	0.08	0.08
query4	1.63	0.11	0.11
query5	0.27	0.27	0.26
query6	1.17	0.67	0.65
query7	0.03	0.02	0.02
query8	0.06	0.04	0.04
query9	0.65	0.52	0.53
query10	0.60	0.58	0.58
query11	0.18	0.11	0.11
query12	0.16	0.12	0.12
query13	0.63	0.62	0.61
query14	0.81	0.86	0.83
query15	0.91	0.88	0.86
query16	0.40	0.40	0.40
query17	1.08	1.10	1.05
query18	0.19	0.20	0.21
query19	1.96	1.87	1.87
query20	0.02	0.02	0.01
query21	15.40	0.95	0.60
query22	0.78	1.25	0.74
query23	14.96	1.42	0.66
query24	6.69	0.56	0.30
query25	0.20	0.10	0.10
query26	0.35	0.16	0.12
query27	0.06	0.04	0.05
query28	10.40	1.45	0.95
query29	12.64	4.12	3.69
query30	0.28	0.13	0.11
query31	3.12	0.65	0.43
query32	3.30	0.58	0.50
query33	3.30	3.28	3.40
query34	17.48	5.82	5.02
query35	5.10	5.14	4.89
query36	0.70	0.52	0.50
query37	0.12	0.07	0.07
query38	0.10	0.05	0.04
query39	0.03	0.03	0.03
query40	0.17	0.14	0.13
query41	0.10	0.03	0.03
query42	0.03	0.02	0.02
query43	0.04	0.04	0.03
Total cold run time: 106.54 s
Total hot run time: 30.66 s