Add DiagnosticSource version check rule

[xiang17]

Why

Follow up of #2405 for DS rule
For issue #2392

What

This PR adds a version check rule for System.Diagnostics.DiagnosticSource. It will back off the auto instrumentation in case a System.Diagnostics.DiagnosticSource is included that can cause the auto instrumentation to crash.

Automated tests are to be added as follow up.

Tests

Unit tests

Checklist

• [ ] CHANGELOG.md is updated.
• [ ] Documentation is updated.
• New features are covered by tests.

[xiang17]

Removed unit tests. It's probably better to test in integration tests, because most of the logic are checking the environment (the Type.GetType() call and version check of DiagnosticSource that's in tracer-home\net folder) outside the class anyways, except the less than check.

For example, checking the DiagnosticSource version of the auto instrumentation library depends on checking StartupHook.LoaderAssemblyLocation, which is the tracer-home\net folder. The unit test project OpenTelemetry.AutoInstrumentation.StartupHook.Tests.csproj doesn't have it.

[pjanotti]

Minor suggestions, but, otherwise LGTM. There should be a follow-up to get the version wanted by auto-instrumentation at build time or from the json created in a separate PR by Raj.