Fix a couple of IAST modules to use the IGSpanInfo in the event over the active span (#11934)

Fix a couple of IAST modules to use the IGSpanInfo in the event over the active span

Co-authored-by: devflow.devflow-routing-intake <devflow.devflow-routing-intake@kubernetes.us1.ddbuild.io>

Author: mcculls

dd-java-agent/agent-iast/src/main/java/com/datadog/iast/sink/HstsMissingHeaderModuleImpl.java

@@ -9,7 +9,6 @@
 import datadog.trace.api.iast.IastContext;
 import datadog.trace.api.iast.sink.HstsMissingHeaderModule;
 import datadog.trace.bootstrap.instrumentation.api.AgentSpan;
-import datadog.trace.bootstrap.instrumentation.api.AgentTracer;
 import java.util.Locale;
 import java.util.Map;
 import java.util.regex.Matcher;
@@ -49,7 +48,7 @@ public void onRequestEnd(final IastContext ctx, final IGSpanInfo igSpanInfo) {
         if (!isHttps(urlString, iastRequestContext.getxForwardedProto())) {
           return;
         }
-        final AgentSpan span = AgentTracer.activeSpan();
+        final AgentSpan span = (AgentSpan) igSpanInfo;
         report(
             span, new Vulnerability(VulnerabilityType.HSTS_HEADER_MISSING, Location.forSpan(span)));
       } catch (Throwable e) {

dd-java-agent/agent-iast/src/main/java/com/datadog/iast/sink/XContentTypeModuleImpl.java

@@ -9,7 +9,6 @@
 import datadog.trace.api.iast.IastContext;
 import datadog.trace.api.iast.sink.XContentTypeModule;
 import datadog.trace.bootstrap.instrumentation.api.AgentSpan;
-import datadog.trace.bootstrap.instrumentation.api.AgentTracer;
 import java.util.Locale;
 import java.util.Map;
 import javax.annotation.Nullable;
@@ -38,7 +37,7 @@ public void onRequestEnd(final IastContext ctx, final IGSpanInfo igSpanInfo) {
         if (isIgnorableResponseCode((Integer) tags.get("http.status_code"))) {
           return;
         }
-        final AgentSpan span = AgentTracer.activeSpan();
+        final AgentSpan span = (AgentSpan) igSpanInfo;
         report(
             span,
             new Vulnerability(