[AMORO-3697] add Flink 1.18 support for mixed-format

[ygjia]

Why are the changes needed?

Close #3697

Brief change log

• change flink version to 1.18.1 in amoro-mixed-flink-common
• add amoro-format-mixed-flink-1.18 and amoro-format-mixed-flink-runtime-1.18

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before making a pull request

Documentation

• Does this pull request introduce a new feature? yes
• If yes, how is the feature documented? related mixed format docs need to be updated

[zhoujinsong]

Hi, you may need to change the access modifier of validate method in https://github.com/apache/amoro/blob/master/amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common-iceberg-bridge/src/main/java/org/apache/iceberg/flink/source/ScanContext.java#L236 to package-private, according the change in Iceberg repo:https://github.com/apache/iceberg/blob/apache-iceberg-1.6.1/flink/v1.18/flink/src/main/java/org/apache/iceberg/flink/source/ScanContext.java#L134

[ygjia]

Hi, you may need to change the access modifier of validate method in https://github.com/apache/amoro/blob/master/amoro-format-mixed/amoro-mixed-flink/amoro-mixed-flink-common-iceberg-bridge/src/main/java/org/apache/iceberg/flink/source/ScanContext.java#L236 to package-private, according the change in Iceberg repo:https://github.com/apache/iceberg/blob/apache-iceberg-1.6.1/flink/v1.18/flink/src/main/java/org/apache/iceberg/flink/source/ScanContext.java#L134

Thanks for the review!
The Iceberg-ScanContext in Iceberg 1.6.1 has changed compared to Amoro-ScanContext, which caused several UTs to fail before.

org.apache.amoro.flink.table.TestUnkeyed
org.apache.amoro.flink.read.TestFlinkSource
org.apache.amoro.flink.table.TestLookupSecondary
org.apache.amoro.flink.table.TestUnkeyedOverwrite

I have aligned it with Iceberg 1.6.1, and above UTs passed locally.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 28.48%. Comparing base (e3c16af) to head (8650606).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3700      +/-   ##
============================================
- Coverage     28.53%   28.48%   -0.06%     
+ Complexity     3759     3756       -3     
============================================
  Files           617      617              
  Lines         50056    49976      -80     
  Branches       6482     6440      -42     
============================================
- Hits          14283    14234      -49     
+ Misses        34760    34729      -31     
  Partials       1013     1013              

Flag	Coverage Δ
core	28.48% <ø> (-0.06%)	⬇️

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[zhoujinsong]

LGTM.

Thanks for the contribution!