[fix](nereids) fix copy into fail with no where expression

[sollhui]

What problem does this PR solve?

introduced by #47194

Copy into with no where expression:

copy into customer from @test_tpch('tpch/sf1/customer.csv.split00.gz') properties ('file.compression' = 'gz', 'copy.async' = 'false');

It will fail:

org.apache.doris.common.NereidsException: errCode = 2, detailMessage = Cannot invoke "java.util.Optional.isPresent()" because the return value of "org.apache.doris.nereids.trees.plans.commands.info.
CopyFromDesc.getFileFilterExpr()" is null
       at org.apache.doris.qe.StmtExecutor.executeByNereids(StmtExecutor.java:694) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:535) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.StmtExecutor.queryRetry(StmtExecutor.java:497) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.StmtExecutor.execute(StmtExecutor.java:482) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.ConnectProcessor.executeQuery(ConnectProcessor.java:358) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.ConnectProcessor.handleQuery(ConnectProcessor.java:249) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.MysqlConnectProcessor.handleQuery(MysqlConnectProcessor.java:233) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.MysqlConnectProcessor.dispatch(MysqlConnectProcessor.java:261) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.MysqlConnectProcessor.processOnce(MysqlConnectProcessor.java:443) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.mysql.ReadListener.lambda$handleEvent$0(ReadListener.java:52) ~[doris-fe.jar:1.2-SNAPSHOT]
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[?:?]
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
       at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: org.apache.doris.common.AnalysisException: errCode = 2, detailMessage = Cannot invoke "java.util.Optional.isPresent()" because the return value of "org.apache.doris.nereids.trees.plans.co
mmands.info.CopyFromDesc.getFileFilterExpr()" is null
       ... 13 more
Caused by: java.lang.NullPointerException: Cannot invoke "java.util.Optional.isPresent()" because the return value of "org.apache.doris.nereids.trees.plans.commands.info.CopyFromDesc.getFileFilterEx
pr()" is null
       at org.apache.doris.nereids.trees.plans.commands.info.CopyIntoInfo.doValidate(CopyIntoInfo.java:262) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.nereids.trees.plans.commands.info.CopyIntoInfo.validate(CopyIntoInfo.java:195) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.nereids.trees.plans.commands.CopyIntoCommand.run(CopyIntoCommand.java:57) ~[doris-fe.jar:1.2-SNAPSHOT]
       at org.apache.doris.qe.StmtExecutor.executeByNereids(StmtExecutor.java:668) ~[doris-fe.jar:1.2-SNAPSHOT]
       ... 12 more

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?

[sollhui]

run buildall

[liaoxin01]

LGTM

[github-actions]

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

[github-actions]

PR approved by anyone and no changes requested.

[hello-stephen]

FE UT Coverage Report

Increment line coverage 33.33% (1/3) 🎉
Increment coverage report
Complete coverage report

[doris-robot]

ClickBench: Total hot run time: 30.53 s

machine: 'aliyun_ecs.c7a.8xlarge_32C64G'
scripts: https://github.com/apache/doris/tree/master/tools/clickbench-tools
ClickBench test result on commit cb0942a6296e34656828d72247849655751d2f28, data reload: false

query1	0.06	0.05	0.05
query2	0.09	0.06	0.06
query3	0.26	0.08	0.08
query4	1.61	0.11	0.12
query5	0.29	0.25	0.25
query6	1.17	0.66	0.64
query7	0.03	0.03	0.03
query8	0.05	0.04	0.05
query9	0.64	0.52	0.53
query10	0.58	0.58	0.57
query11	0.17	0.11	0.11
query12	0.15	0.12	0.12
query13	0.63	0.62	0.62
query14	1.02	1.02	1.03
query15	0.88	0.86	0.85
query16	0.41	0.40	0.41
query17	1.08	1.10	1.07
query18	0.22	0.20	0.20
query19	1.94	1.91	1.91
query20	0.02	0.02	0.01
query21	15.40	0.93	0.61
query22	0.77	1.26	0.68
query23	14.78	1.31	0.66
query24	7.89	0.67	1.37
query25	0.50	0.17	0.20
query26	0.68	0.17	0.14
query27	0.06	0.05	0.06
query28	8.86	1.31	0.93
query29	12.61	3.97	3.35
query30	0.28	0.13	0.11
query31	2.84	0.59	0.38
query32	3.24	0.55	0.47
query33	3.09	3.08	3.11
query34	16.16	5.51	4.83
query35	4.92	4.90	4.86
query36	0.68	0.53	0.51
query37	0.09	0.07	0.08
query38	0.06	0.05	0.04
query39	0.03	0.02	0.02
query40	0.18	0.15	0.15
query41	0.08	0.03	0.03
query42	0.03	0.03	0.04
query43	0.04	0.04	0.03
Total cold run time: 104.57 s
Total hot run time: 30.53 s

[dataroaring]

LGTM

[hello-stephen]

FE Regression Coverage Report

Increment line coverage 0.00% (0/3) 🎉
Increment coverage report
Complete coverage report