Populate OTel Schema URL on Activity Sources and Meters

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your feature request related to a problem? Please describe the problem.

OTel telemetry should have schema source and version associated with it. It helps to validate, transform, evolve, and query telemetry data. See https://github.com/dotnet/runtime/issues/63651#issuecomment-2608691490 for the context

### Describe the solution you'd like

SchemaURL support is being introduced in .NET 10 - https://github.com/dotnet/runtime/pull/113034, we should set it on ActivitySources and Meters created by ASP.NET Core, SignalR, RateLimiting, etc (see [all sources](https://github.com/search?q=repo%3Adotnet%2Faspnetcore+%22new+ActivitySource%22+NOT+path%3Atest&type=code) and [meters](https://github.com/search?q=repo%3Adotnet%2Faspnetcore+%22MeterFactory.create%22+NOT+path%3Atest&type=code), probably also [this meter](https://github.com/search?q=repo%3Adotnet%2Faspnetcore+%22new+Meter%22+NOT+path%3Atest&type=code))

### Additional context

_No response_