adds the bigip_cli_script module (#44674)

This module can be used to manage tmsh cli scripts on a BIG-IP

test/units/modules/network/f5/fixtures/load_tm_cli_script_1.json

@@ -0,0 +1,13 @@
+{
+    "kind": "tm:cli:script:scriptstate",
+    "name": "foo",
+    "partition": "Common",
+    "fullPath": "/Common/foo",
+    "generation": 62,
+    "selfLink": "https://localhost/mgmt/tm/cli/script/~Common~foo?ver=12.1.3",
+    "apiAnonymous": "proc script::run {} {}\n",
+    "ignoreVerification": "false",
+    "scriptChecksum": "2a7a57176f8d6ef585ea3cd0db787718",
+    "totalSigningStatus": "checksum",
+    "verificationStatus": "checksum-verified"
+}