fix(tianmu): disable primary key as tianmu engine did not support well

[hustjieke]

[summary]
fix 1:#818 Master slave synchronization - There will be too many tuples problem

Cause:
Tianmu::dbhandler::TianmuHandler::current_position This variable is not initialized. In some cases, a large value may cause too many tuples problem.
Solution: Initialize the variable

fix 2:#819 Master slave synchronization - Primary key conflict problem

Solution: Modify the modification logic of master slave synchronization, so that the delete and update operations do not follow the primary key logic

Supplement

sql/sql_insert.cc
Fix the problem that the insert statement will not generate binlog in the delayed insert mode storage/tianmu/handler/tianmu_handler.cpp
Fix the binlog error of the line format generated by the tianmu engine

Summary about this PR

Issue Number: close #issue_number_you_created

Tests Check List

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

Changelog

• New Feature
• Bug Fix
• Performance Improvement
• Build/Testing/CI/CD
• Documentation
• Not for changelog (changelog entry is not required)

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features

[mergify]

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