Fix infinite recursion bug when getting tracer (#760)

Co-authored-by: Bryce Buchanan <[email protected]>

Author: angelodipaolo

Sources/OpenTelemetryApi/Trace/TracerProvider.swift

@@ -13,24 +13,40 @@ public protocol TracerProvider {
   ///   - instrumentationVersion:  The version of the instrumentation library (e.g., "semver:1.0.0"). Optional
   ///   - schemaUrl: The schema url. Optional
   ///   - attributes: attributes to be associated with span created by this tracer. Optional
-  func get(
-    instrumentationName: String,
-    instrumentationVersion: String?,
-    schemaUrl: String?,
-    attributes: [String: AttributeValue]?
-  ) -> any Tracer
+  func get(instrumentationName: String,
+           instrumentationVersion: String?,
+           schemaUrl: String?,
+           attributes: [String: AttributeValue]?) -> any Tracer
 }
 
 public extension TracerProvider {
+  func get(instrumentationName: String) -> any Tracer {
+    get(
+      instrumentationName: instrumentationName,
+      instrumentationVersion: nil,
+      schemaUrl: nil,
+      attributes: nil
+    )
+  }
+
+  func get(instrumentationName: String,
+           instrumentationVersion: String?) -> any Tracer {
+    get(
+      instrumentationName: instrumentationName,
+      instrumentationVersion: instrumentationVersion,
+      schemaUrl: nil,
+      attributes: nil
+    )
+  }
+
   func get(instrumentationName: String,
-           instrumentationVersion: String? = nil,
-           schemaUrl: String? = nil,
-           attributes: [String: AttributeValue]? = nil) -> any Tracer {
-    return get(
+           instrumentationVersion: String?,
+           schemaUrl: String?) -> any Tracer {
+    get(
       instrumentationName: instrumentationName,
       instrumentationVersion: instrumentationVersion,
       schemaUrl: schemaUrl,
-      attributes: attributes
+      attributes: nil
     )
   }
 }