Added SubstringOrPatternMatcher

[jamescrosswell]

Resolves #3560

Summary

Previously we had a SubstringOrRegexPattern class that could store either a string or a regular expression and contained some logic to test either whether that string was a substring or whether the regular expression matched against some other target string.

Instead we now have a StringOrRegex class that takes care of holding the string or regular expression, the ability to bind those values to configuration storage and provides various extensions.

The logic to test that string or regex against a target has been refactored into a SubstringOrPatternMatcher class implementing IStringOrRegexMatcher.

[bitsandfoxes]

We don't have anything on the samples using this?

[jamescrosswell]

We don't have anything on the samples using this?

It would be used indirectly via various properties on the SentryOptions (TagFilters, InAppExclude, FailedRequestTargets and TracePropagationTargets). We don't seem to demo how to use any of those in the Samples.

It's also used in the ExperimentalMetricsOptions, which we do have some samples for - e.g .here:

sentry-dotnet/samples/Sentry.Samples.OpenTelemetry.AspNetCore/Program.cs

Lines 50 to 59 in 43e28ad

	options.ExperimentalMetrics = new ExperimentalMetricsOptions()
	{
	// Here we're telling Sentry to capture all built-in metrics. This includes all the metrics we configured
	// OpenTelemetry to emit when we called `builder.Services.AddOpenTelemetry()` above:
	// - "OpenTelemetry.Instrumentation.Runtime"
	// - "Microsoft.AspNetCore.Hosting",
	// - "Microsoft.AspNetCore.Server.Kestrel",
	// - "System.Net.Http"
	CaptureSystemDiagnosticsMeters = BuiltInSystemDiagnosticsMeters.All
	};

But nothing showing how people can define their own string or regex to assign to any of those options.