feature request: Make DependecyTypes from RemoteDependencyConstants public

[OskarKlintrot]

Is your feature request related to a problem?
DependencyTelemetry.Type is a string but is set using constants from RemoteDependencyConstants. It would be nice to be able to use those constants instead of comparing to magic strings, for example "HTTP".

Describe the solution you'd like.
Some properties related to operation details in RemoteDependencyConstants got moved out to its own class in #2524. I suggest a similar solution here.

Describe alternatives you've considered.
Leave it as-is. Make the entire class RemoteDependencyConstants public. Use an enum.

Additional context.
This is suggested by @older in #1326.

[github-actions]

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[OskarKlintrot]

Not stale

[OskarKlintrot]

@cijothomas Does this seem like a good idea? I think I can open a PR if it does.

My suggestion: Move Microsoft.ApplicationInsights.DependencyCollector.Implementation.RemoteDependencyConstants up a notch to Microsoft.ApplicationInsights.DependencyCollector.RemoteDependencyConstants and make it public. What do you say?

[cijothomas]

While the idea is good, I think its best to look into the OpenTelemetry based solutions (which are not quite as feature rich as this sdk, but getting there..), given that OTel is the long term direction for telemetry sdks.

(You may have noticed that this repo has stopped making any changes except security issues/updates to support newer .NET runtimes etc.)