Add test for IKEv2 Weak DH parameters detection

diff --git a/tests/ikev2-weak-dh/IKEv2_SA_INIT_2-8-weak.pcap b/tests/ikev2-weak-dh/IKEv2_SA_INIT_2-8-weak.pcap
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Binary files /dev/null and b/tests/ikev2-weak-dh/IKEv2_SA_INIT_2-8-weak.pcap differ

diff --git a/tests/ikev2-weak-dh/README.md b/tests/ikev2-weak-dh/README.md
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+Simple test that tests a IKEv2 SA_INIT initiator request with weak Diffie-Hellman parameters.
+
+PCAP URL:
+  https://redmine.openinfosecfoundation.org/attachments/1630

diff --git a/tests/ikev2-weak-dh/test.rules b/tests/ikev2-weak-dh/test.rules
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+alert ikev2 any any -> any any (msg:"SURICATA IKEv2 weak cryptographic parameters (Diffie-Hellman)"; flow:to_server; app-layer-event:ikev2.weak_crypto_dh; classtype:protocol-command-decode; sid:1; rev:1;)

diff --git a/tests/ikev2-weak-dh/test.yaml b/tests/ikev2-weak-dh/test.yaml
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+requires:
+  features:
+    - HAVE_LIBJANSSON
+    - RUST
+  min-version: 4.1.0
+
+args:
+  - -k none
+
+checks:
+
+  - filter:
+      count: 1
+      match:
+        event_type: alert
+        alert.signature_id: 1
+        alert.signature: "SURICATA IKEv2 weak cryptographic parameters (Diffie-Hellman)"
+
+  - filter:
+      count: 1
+      match:
+        event_type: ikev2
+        ikev2.version_major: 2
+        ikev2.exchange_type: 34
+        ikev2.init_spi: "61d3693ce12af528"
+        ikev2.resp_spi: "0000000000000000"