feat: add MongoDB driver handshake metadata for Java-based client connections

[alexbevi]

Passes MongoDriverInformation to MongoClients.create() in MongoDBResourceManager so that MongoDB server-side telemetry can identify traffic originating from Apache Beam.

What changes

it/mongodb/src/main/java/.../MongoDBResourceManager.java

• Adds a package-visible DRIVER_INFO constant (@VisibleForTesting) built with MongoDriverInformation.builder().driverName("Apache Beam").build().
• Passes it as the second argument to MongoClients.create(connectionString, DRIVER_INFO) when no external MongoClient is provided. When a client is injected via the @VisibleForTesting constructor (e.g. in unit tests), the external client is used unchanged.

This will appear in mongos/d logs similar to:

{"t":{"$date":"..."},"s":"I","c":"NETWORK","id":51800,"ctx":"conn1","msg":"client metadata","attr":{"doc":{"driver":{"name":"mongo-java-driver|Apache Beam","version":"5.5.0"},"os":{"type":"Linux"},"platform":"Java/..."}}}

See the MongoDB handshake specification for more info.

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R: @chamikaramj for label java.

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