Updated no codew instrumentation config root node name to match the one used by .NET

Author: robsunday

instrumentation/nocode-testing/src/test/java/com/splunk/opentelemetry/instrumentation/nocode/YamlParserTest.java

@@ -113,7 +113,7 @@ void shouldParseFromDeclarativeConfigYaml() {
             instrumentation/development:
               java:
                 splunk:
-                  nocode:
+                  no_code:
                     - class: foo.Foo
                       method: foo
                     - class: foo.Foo
@@ -122,7 +122,7 @@ void shouldParseFromDeclarativeConfigYaml() {
     OpenTelemetryConfigurationModel model = DeclarativeConfigTestUtil.parse(yaml);
     DeclarativeConfigProperties splunkRoot =
         AutoConfigureUtil.getInstrumentationConfig(model).getStructured("splunk", empty());
-    List<DeclarativeConfigProperties> ruleNodes = splunkRoot.getStructuredList("nocode");
+    List<DeclarativeConfigProperties> ruleNodes = splunkRoot.getStructuredList("no_code");
 
     // when
     List<NocodeRules.Rule> rules = YamlParser.parseFromDeclarativeConfig(ruleNodes);

instrumentation/nocode/src/main/java/com/splunk/opentelemetry/instrumentation/nocode/NocodeInitializer.java

@@ -51,7 +51,7 @@ private static void processEmbeddedRules(ConfigProvider configProvider) {
     DeclarativeConfigProperties config = configProvider.getInstrumentationConfig("splunk");
 
     if (config != null) {
-      List<DeclarativeConfigProperties> nocodeRules = config.getStructuredList("nocode");
+      List<DeclarativeConfigProperties> nocodeRules = config.getStructuredList("no_code");
       if (nocodeRules != null) {
         NocodeRules.setGlobalRules(YamlParser.parseFromDeclarativeConfig(nocodeRules));
       }