upgrade goflow2 to fix netflow parser issue (#49888)

### What does this PR do?
This PR integrates the change from this PR netsampler/goflow2#503 to fix an issue we are seeing in some customer environments when parsing incoming packets.

### Motivation
Addresses an issue reported by a customer

### Describe how you validated your changes
* Replayed packets from a pcap to validate that they are now parsed as expected

### Additional Notes


Co-authored-by: garrison.stauffer <garrison.stauffer@datadoghq.com>

Author: garrison-stauffer

go.mod

@@ -283,7 +283,7 @@ require (
 	github.com/miekg/dns v1.1.72
 	github.com/moby/sys/mountinfo v0.7.2
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
-	github.com/netsampler/goflow2 v1.3.3
+	github.com/netsampler/goflow2 v1.3.8-0.20260412031118-ad727784ae6f
 	github.com/oliveagle/jsonpath v0.0.0-20180606110733-2e52cf6e6852
 	github.com/open-policy-agent/opa v1.7.1
 	github.com/open-telemetry/opentelemetry-collector-contrib/pkg/datadog v0.150.0
@@ -654,7 +654,7 @@ require (
 	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/leodido/go-syslog/v4 v4.3.0 // indirect
 	github.com/leodido/ragel-machinery v0.0.0-20190525184631-5f46317e436b // indirect
-	github.com/libp2p/go-reuseport v0.2.0 // indirect
+	github.com/libp2p/go-reuseport v0.3.0 // indirect
 	github.com/lightstep/go-expohisto v1.0.0 // indirect
 	github.com/linode/go-metadata v0.2.4 // indirect
 	github.com/linode/linodego v1.66.0 // indirect

go.sum

@@ -0,0 +1,13 @@
+# Each section from every release note are combined when the
+# CHANGELOG.rst is rendered. So the text needs to be worded so that
+# it does not depend on any information only available in another
+# section. This may mean repeating some details, but each section
+# must be readable independently of the other.
+#
+# Each section note must be formatted as reStructuredText.
+---
+fixes:
+  - |
+    Fixes an issue with the NetFlow collector where certain packets would be dropped, producing
+    error logs and lost data. The issue was caused when a packet had trailing padding
+    which was not properly handled.