[tests] declare python dependencies with specific versions (#8721)

tests/scripts/thread-cert/requirements.in

@@ -0,0 +1,4 @@
+ipaddress
+pexpect
+pycryptodome
+pyshark==0.4.6

tests/scripts/thread-cert/requirements.txt

@@ -1,4 +1,22 @@
-ipaddress
-pexpect
-pycryptodome
+#
+# This file is autogenerated by pip-compile with Python 3.10
+# by the following command:
+#
+#    pip-compile requirements.in
+#
+ipaddress==1.0.23
+    # via -r requirements.in
+lxml==4.9.2
+    # via pyshark
+packaging==23.0
+    # via pyshark
+pexpect==4.8.0
+    # via -r requirements.in
+ptyprocess==0.7.0
+    # via pexpect
+py==1.11.0
+    # via pyshark
+pycryptodome==3.17
+    # via -r requirements.in
 pyshark==0.4.6
+    # via -r requirements.in