Libraries work to support Cloud Native effort for .NET 9

[tarekgh]

OpenTelemetry

• Add "hints" in Metric API to provide things like histogram bounds #63650 S-M
• Activity should have AddExceptionMethod #53641 S-M
• [Feature Request]: Add synchronous gauge instrument #92625 S-M
• Support adding links to Activity after it is created #97680 S-M

Logging

• [Feature Request]: Better ILogger sampling and filtering #82465 M
• Integrate ConsoleLogExporter functionality from dotnet/extensions #87250 S-M
• Logging AddSimpleConsole should allow for trimming Json and Systemd formatters #85116 S-M

Logging Source Gen

Consolidating all source gen work for logging, options, and configuration - L

• Logging source generator reruns code generation phase on keypress. #93309
• Improve LoggerMessageGenerator incrementality #76119
• LoggerMessageGenerator optimizations #91178

Metrics

• Metrics for System.Runtime #85372 M
• [Feature request]: Support instrumentation scope attributes on ActivitySource #93795 S-M

MetricsEventSource

• [Feature Request] Faster aggregation for the MetricsEventSource under concurrency #71563 S-M
• MetricEventSource value published events don't unambiguously resolve which Meter and Instrument tags they are refering to #93767 S-M
• MetricEventSource value published events don't resolve which scope they are refering to #93097 S-M

Analyzers

• [Analyzer] Usage of ToString in logging source generator method call sites #78402 S
• [Analyzer] Replacing direct LoggerExtensions.Log* usage with source-generated logging methods #78406 S