applayer: add tests for ticket 7044

tests/truncate-applayer-test-01/README.md

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+# Test Description
+
+This test demonstrates that if the stream reassembly depth is reached on one direction,
+it does not block the other side.
+For the given PCAP, to server direction reaches the depth and stops processing leading
+to no alert having been logged for a valid to server request in the stream which would
+be processed in case there was no depth (sid: 2).
+However, this does not stall the packets in other direction from being the processed,
+the response to the same request is still processed and a corresponding alert is logged
+(sid: 1).
+
+## PCAP
+
+tshark.dev
+
+## Related issues
+
+https://redmine.openinfosecfoundation.org/issues/7044

tests/truncate-applayer-test-01/test.rules

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+alert dcerpc any any -> any any (msg:"Test Alert 1"; sid:1; flow:established,to_client; dcerpc.stub_data; bsize:2124;)
+alert dcerpc any any -> any any (msg:"Test Alert 2"; sid:2; flow:established,to_server; dcerpc.stub_data; bsize:2148; dcerpc.opnum: 9;)
+

tests/truncate-applayer-test-01/test.yaml

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+args:
+  - -k none --set stream.reassembly.depth=8kb
+
+requires:
+  min-version: 7
+
+checks:
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 1
+      pcap_cnt: 46
+- filter:
+    count: 0    # because of the depth constraints
+    match:
+      event_type: alert
+      alert.signature_id: 2
+- filter:
+     count: 1
+     match:
+       event_type: dcerpc
+       pcap_cnt: 40
+       dcerpc.request: "REQUEST_LOST"
+       dcerpc.response: "RESPONSE"
+       dcerpc.call_id: 5360

tests/truncate-applayer-test-02/README.md

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+# Test Description
+
+This test demonstrates that the pcap is properly parsed and assessed in case
+there was ample stream reassembly depth (default in this case).
+
+## PCAP
+
+tshark.dev
+
+## Related issues
+
+https://redmine.openinfosecfoundation.org/issues/7044

tests/truncate-applayer-test-02/test.rules

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+alert dcerpc any any -> any any (msg:"Test Alert 1"; sid:1; flow:established,to_client; dcerpc.stub_data; bsize:2124;)
+alert dcerpc any any -> any any (msg:"Test Alert 2"; sid:2; flow:established,to_server; dcerpc.stub_data; bsize:2148; dcerpc.opnum: 9;)
+

tests/truncate-applayer-test-02/test.yaml

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+pcap: ../truncate-applayer-test-01/input.pcap
+
+args:
+  - -k none
+
+checks:
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 1
+- filter:
+    count: 1
+    match:
+      event_type: alert
+      alert.signature_id: 2
+- filter:
+     count: 1
+     match:
+       event_type: dcerpc
+       pcap_cnt: 40
+       dcerpc.request: "REQUEST"
+       dcerpc.response: "RESPONSE"
+       dcerpc.call_id: 5360