branch-4.1: [config](pick) Add max_bucket_num_per_partition config to limit bucket number #61576 #62286

[gavinchou]

Summary

Pick PR #61576 and #62286 to branch-4.1, combining both changes into one commit.

Changes

Add a new FE config max_bucket_num_per_partition to limit the maximum number of buckets when creating a table or adding a partition. Default value is 768.

1. Add max_bucket_num_per_partition config in Config.java, defaulting to 768
2. Add bucket number validation in DistributionDescriptor.validate() for CREATE TABLE scenario
3. Add bucket number validation in InternalCatalog.addPartition() for ALTER TABLE ADD PARTITION scenario
4. Add unit tests for the new validation logic
5. Add regression test configurations

Behavior

• For user-specified buckets (CREATE TABLE / ALTER TABLE ADD PARTITION): if bucket number exceeds this limit, the operation will be rejected with a helpful error message
• For auto-bucket feature (Dynamic Partition): bucket number is capped by autobucket_max_buckets automatically, no change
• Set to 0 or negative value to disable this limit

Test

• FE unit tests passed locally (DistributionDescriptorTest)
• FE build passed locally

Related Issue

close #61576
close #62286

[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?

[gavinchou]

run buildall

[gavinchou]

run buildall

[hello-stephen]

FE UT Coverage Report

Increment line coverage 27.27% (3/11) 🎉
Increment coverage report
Complete coverage report