feat: support adjust query's priority

[dqhl76]

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Summary

Tracking on: https://github.com/datafuselabs/databend/issues/15462

feat: support adjust query's priority

support dynamic adjust query's priority

How to use

SET PRIORITY (HIGH | MEDIUM | LOW) <session_id>

can get session_id from show processlist;

Test

send two same query: select avg(number) from numbers(10000000000);

root@localhost:8000/default> set priority high '39c01f8f-6c14-40bc-a1f8-1d24e9cd4a75';
root@localhost:8000/default> set priority low '7575b113-ce11-474f-b97a-292f0bb57c42';

39c01f8f-6c14-40bc-a1f8-1d24e9cd4a75

root@localhost:8000/default> select avg(number) from numbers(10000000000);
1 row read in 102.907 sec. Processed 10 billion row, 74.51 GiB (97.18 million row/s, 741.39 MiB/s)

7575b113-ce11-474f-b97a-292f0bb57c42

root@localhost:8000/default> select avg(number) from numbers(10000000000);
1 row read in 135.393 sec. Processed 10 billion row, 74.51 GiB (73.86 million row/s, 563.50 MiB/s)

Tests

• [ ] Unit Test
• [x] Logic Test
• [ ] Benchmark Test
• [ ] No Test - Explain why

Type of change

• [ ] Bug Fix (non-breaking change which fixes an issue)
• [x] New Feature (non-breaking change which adds functionality)
• [ ] Breaking Change (fix or feature that could cause existing functionality not to work as expected)
• [ ] Documentation Update
• [ ] Refactoring
• [ ] Performance Improvement
• [ ] Other (please describe):

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