RUBY-3759 Fix flaky CSOT tests

[comandeo-mongo]

No description provided.

[Copilot]

Pull request overview

This PR fixes flaky Client-Side Operations Timeout (CSOT) tests by increasing timeout margins and correcting test expectations for transaction behavior.

Changes:

• Increased timeout values from 50ms to 500ms and block times from 60ms to 600ms, providing a larger margin (100ms vs 10ms) to reduce test flakiness
• Updated withTransaction test expectations to properly model abort behavior, including both insert and abortTransaction in failpoint configuration
• Added minPoolSize configuration and upgraded schema version to 1.26 in sessions-inherit-timeoutMS.yml to support awaitMinPoolSizeMS

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
sessions-override-timeoutMS.yml	Updated timeout values (50ms→500ms, 60ms→600ms) and corrected withTransaction test to expect abortTransaction events
sessions-override-operation-timeoutMS.yml	Updated timeout values (50ms→500ms, 60ms→600ms) and corrected withTransaction test to expect abortTransaction events
sessions-inherit-timeoutMS.yml	Updated timeout values (50ms→500ms, 60ms→600ms), upgraded schema to 1.26, added minPoolSize/awaitMinPoolSizeMS configuration, and corrected withTransaction test expectations

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