RUBY-3552 Deprecate support for server version 3.6

[jamis]

This PR deprecates support for MongoDB server version 3.6 in the Ruby driver. It also adds a new Mongo::Deprecations module, which we should embrace elsewhere in the code for warning about deprecated features.

[Copilot]

Pull request overview

This PR deprecates support for MongoDB server version 3.6 (wire version 6) by adding a new deprecation warning system. When the driver connects to a MongoDB 3.6 server, it will now log a warning indicating that support for this version will be removed in a future release.

Changes:

• Introduced a new Mongo::Deprecations module for tracking and reporting deprecated features with thread-safe, once-per-feature warning logic
• Modified the Features.check_driver_support! method to check for deprecated wire versions and issue warnings before checking for unsupported versions
• Added test coverage for the deprecation warning functionality

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 6 comments.

File	Description
lib/mongo/deprecations.rb	New module providing thread-safe deprecation warning system with once-per-feature tracking
lib/mongo/server/description/features.rb	Added DEPRECATED_WIRE_VERSIONS constant (set to 6..6 for MongoDB 3.6) and deprecation check logic in check_driver_support!
lib/mongo.rb	Added require statement for the new deprecations module
spec/mongo/server/description/features_spec.rb	Added test case verifying deprecation warning is issued for deprecated wire versions

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