CSHARP-5711: Avoid clearing the connection pool when the server connection rate limiter triggers

[sanych-sun]

No description provided.

[Copilot]

Pull request overview

This PR implements support for avoiding connection pool clearing when the server connection rate limiter triggers, adding the "SystemOverloadedError" and "RetryableError" labels to network errors during connection establishment or handshake. This allows the driver to apply backpressure instead of unnecessarily clearing the pool.

• Added error label support to identify rate limiter backpressure scenarios
• Modified pool clearing logic to skip clearing when SystemOverloadedError is present
• Updated test specifications to reflect the new behavior

Reviewed changes

Copilot reviewed 75 out of 75 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/MongoDB.Driver/Core/Connections/BinaryConnection.cs	Adds backpressure error labels to network errors during connection establishment/handshake
src/MongoDB.Driver/Core/Servers/DefaultServer.cs	Prevents pool clearing when SystemOverloadedError label is present
src/MongoDB.Driver/Core/Misc/Feature.cs	Adds IngressConnectionEstablishmentRateLimiter feature flag for server version 8.0+
tests/MongoDB.Driver.Tests/Specifications/server-discovery-and-monitoring/prose-tests/ServerDiscoveryProseTests.cs	Adds prose test validating pool isn't cleared during backpressure
tests/MongoDB.Driver.Tests/Specifications/connection-monitoring-and-pooling/ConnectionMonitoringAndPoolingTestRunner.cs	Updates test runner to handle interruptInUseConnections parameter
tests/MongoDB.Driver.Tests/Specifications/UnifiedTestSpecRunner.cs	Removes skip exception for previously flaky pool-clear tests
specifications/server-discovery-and-monitoring/tests/unified/.yml/.json	Updates schema versions from 1.10 to 1.4 and test descriptions
specifications/connection-monitoring-and-pooling/tests/cmap-format/.yml/.json	Renames closeInUseConnections to interruptInUseConnections throughout tests
specifications/load-balancers/tests/.yml/.json	Changes test expectations from network errors to server errors

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[Copilot]

Missing space between parameter attribute and parameter type. Add space after closing bracket of Values attribute.

Suggested change

	public async Task Connection_Pool_Backpressure([Values(true, false)]bool async)
	public async Task Connection_Pool_Backpressure([Values(true, false)] bool async)