PYTHON-5529 Introduce optin setting to await for MinPoolSize population

[blink1073]

PYTHON-5529

Changes in this PR

Updated spec runner to add support for awaitMinPoolSizeMS and bumped the supported schema version

Test Plan

Verified that the setting was applied by setting a breakpoint in the new block.

Checklist

Checklist for Author

• Did you update the changelog (if necessary)?
• Is there test coverage?
• Is any followup work tracked in a JIRA ticket? If so, add link(s).

Checklist for Reviewer

• Does the title of the PR reference a JIRA Ticket?
• Do you fully understand the implementation? (Would you be comfortable explaining how this code works to someone else?)
• Is all relevant documentation (README or docstring) updated?

[caseyclements]

LGTM

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