feat(python): Document HTTP request code origin options (#15268)

Document the `enable_http_request_source` and `http_request_source_threshold_ms` options for adding code source attributes to outgoing HTTP spans in the Python SDK.

Author: alexander-alderman-webb

docs/platforms/python/configuration/options.mdx

@@ -409,6 +409,18 @@ The threshold in milliseconds for adding the source location to database queries
 
 </SdkOption>
 
+<SdkOption name="enable_http_request_source" type='bool' defaultValue='True'>
+
+When enabled, the source location will be added to outgoing HTTP requests.
+
+</SdkOption>
+
+<SdkOption name="http_request_source_threshold_ms" type='int' defaultValue='100'>
+
+The threshold in milliseconds for adding the source location to an outgoing HTTP request. The request location will be added to the request for requests slower than the specified threshold.
+
+</SdkOption>
+
 <SdkOption name="trace_ignore_status_codes" type='bool' defaultValue='frozenset()'>
 
 An optional property that disables tracing for HTTP requests with certain status codes.