[fix](nereids) when Expression has no more than 2 children, the attribute hasUnbound is not set correctly

[englefly]

What problem does this PR solve?

Issue Number: close #xxx

Related PR: #32617

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

[hello-stephen]

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?

[englefly]

run buildall

[github-actions]

PR approved by at least one committer and no changes requested.

[github-actions]

PR approved by anyone and no changes requested.

[morrySnow]

add related PR

[englefly]

run buildall

[englefly]

run buildall

[hello-stephen]

FE UT Coverage Report

Increment line coverage 100.00% (3/3) 🎉
Increment coverage report
Complete coverage report

[doris-robot]

TPC-H: Total hot run time: 33069 ms

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/tpch-tools
Tpch sf100 test result on commit 91223a9a349fbc30026dd721246f29d4f8ef23e7, data reload: false

------ Round 1 ----------------------------------
q1	17599	5241	5050	5050
q2	2031	304	192	192
q3	10215	1302	803	803
q4	10209	851	322	322
q5	7858	2182	1953	1953
q6	246	185	153	153
q7	902	741	632	632
q8	9289	1383	1124	1124
q9	5281	4874	4868	4868
q10	6863	1951	1577	1577
q11	514	292	277	277
q12	392	383	221	221
q13	17805	4088	3245	3245
q14	248	245	220	220
q15	910	839	816	816
q16	679	685	620	620
q17	645	741	547	547
q18	7022	6461	7553	6461
q19	2587	1029	694	694
q20	412	351	243	243
q21	2873	2270	1993	1993
q22	1138	1128	1058	1058
Total cold run time: 105718 ms
Total hot run time: 33069 ms

----- Round 2, with runtime_filter_mode=off -----
q1	5683	5478	5426	5426
q2	263	337	280	280
q3	2416	2810	2540	2540
q4	1468	2009	1566	1566
q5	4705	4414	4517	4414
q6	228	177	139	139
q7	2065	1935	1789	1789
q8	2579	2478	2540	2478
q9	7782	7512	7299	7299
q10	2874	2987	2436	2436
q11	542	456	437	437
q12	622	692	569	569
q13	3535	4011	3227	3227
q14	272	281	273	273
q15	839	806	787	787
q16	649	686	630	630
q17	1079	1323	1294	1294
q18	7553	7564	7323	7323
q19	822	772	775	772
q20	1974	2059	1889	1889
q21	4462	4121	4152	4121
q22	1082	1047	983	983
Total cold run time: 53494 ms
Total hot run time: 50672 ms

[doris-robot]

ClickBench: Total hot run time: 28.07 s

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit 91223a9a349fbc30026dd721246f29d4f8ef23e7, data reload: false

query1	0.06	0.05	0.05
query2	0.09	0.05	0.05
query3	0.26	0.09	0.08
query4	1.61	0.11	0.11
query5	0.27	0.27	0.25
query6	1.17	0.68	0.66
query7	0.03	0.02	0.02
query8	0.05	0.04	0.04
query9	0.57	0.50	0.49
query10	0.56	0.54	0.55
query11	0.15	0.10	0.10
query12	0.14	0.10	0.12
query13	0.63	0.62	0.62
query14	1.07	1.05	1.04
query15	0.88	0.86	0.87
query16	0.41	0.39	0.43
query17	1.13	1.14	1.16
query18	0.23	0.22	0.21
query19	2.07	2.01	1.93
query20	0.01	0.01	0.02
query21	15.42	0.26	0.13
query22	5.30	0.05	0.05
query23	16.11	0.28	0.10
query24	1.48	0.31	0.17
query25	0.06	0.09	0.07
query26	0.14	0.13	0.13
query27	0.09	0.09	0.06
query28	3.22	1.16	0.96
query29	12.54	3.86	3.14
query30	0.28	0.13	0.11
query31	2.82	0.66	0.40
query32	3.24	0.60	0.49
query33	3.20	3.28	3.32
query34	16.50	5.38	4.71
query35	4.82	4.84	4.72
query36	0.65	0.49	0.49
query37	0.11	0.08	0.07
query38	0.07	0.05	0.03
query39	0.04	0.03	0.03
query40	0.18	0.17	0.15
query41	0.08	0.03	0.03
query42	0.04	0.03	0.03
query43	0.05	0.04	0.03
Total cold run time: 97.83 s
Total hot run time: 28.07 s

[englefly]

run cloud_p0

[hello-stephen]

FE Regression Coverage Report

Increment line coverage 100.00% (3/3) 🎉
Increment coverage report
Complete coverage report

[github-actions]

PR approved by at least one committer and no changes requested.