replay: support audit log plugin v2 format

[YangKeao]

What problem does this PR solve?

Issue Number: close #1056

Problem Summary:

What is changed and how it works:

Implement a basic support for audit log extension.

The current implementation (based on current extension format) has the following known issues:

1. All parameters are parsed as string.
2. Empty string parameters cannot be parsed correctly.
3. Only end time is stored in the extension format.

Check List

Tests

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

Notable changes

• Has configuration change
• Has HTTP API interfaces change
• Has tiproxyctl change
• Other user behavior changes

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

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Skipping CI for Draft Pull Request.
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[ti-chi-bot]

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.28090% with 66 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@14d5243). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
pkg/sqlreplay/cmd/audit_log_extension.go	80.61%	32 Missing and 12 partials ⚠️
pkg/sqlreplay/replay/replay.go	20.00%	9 Missing and 3 partials ⚠️
pkg/sqlreplay/cmd/cmd.go	12.50%	7 Missing ⚠️
pkg/sqlreplay/store/rotate.go	75.00%	1 Missing and 1 partial ⚠️
cmd/replayer/main.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1057   +/-   ##
=======================================
  Coverage        ?   67.73%           
=======================================
  Files           ?      141           
  Lines           ?    14711           
  Branches        ?        0           
=======================================
  Hits            ?     9965           
  Misses          ?     4066           
  Partials        ?      680           

Flag	Coverage Δ
unit	67.73% <75.28%> (?)

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