.*: Remove useless settings join_concurrent_build

[SeaRise]

What problem does this PR solve?

Issue Number: ref #5900

• Remove useless settings join_concurrent_build
• Different streams must hold different stream index, because Join.rows_not_inserted_to_map assumes that multiple streams will not operate on the same rows_not_inserted_to_map. So we should use std::max(build_pipeline.streams.size(), build_pipeline.streams_with_non_joined_data.size()) as join_build_concurrency.
  

  tiflash/dbms/src/Interpreters/Join.cpp

  Lines 432 to 436 in 33aaccc

  	if (getFullness(kind))
  	{
  	for (size_t i = 0; i < getNotJoinedStreamConcurrencyInternal(); ++i)
  	rows_not_inserted_to_map.push_back(std::make_unique<RowRefList>());
  	}

  
  

  tiflash/dbms/src/Interpreters/Join.cpp

  Lines 637 to 644 in 33aaccc

  	/// null value
  	/// here ignore mutex because rows_not_inserted_to_map is privately owned by each stream thread
  	for (auto index : segment_index_info[segment_index])
  	{
  	/// for right/full out join, need to record the rows not inserted to map
  	auto * elem = reinterpret_cast<Join::RowRefList *>(pool.alloc(sizeof(Join::RowRefList)));
  	insertRowToList(rows_not_inserted_to_map, elem, stored_block, index);
  	}

Problem Summary:

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• windtalker
• ywqzzy

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[SeaRise]

/run-all-tests

[windtalker]

LGTM

[SeaRise]

/merge

[ti-chi-bot]

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/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: afd3fdc

[SeaRise]

/run-unit-test