Augment Spicy-related features so they emit test using spicy-driver batch files

[bbannier]

For Spicy-based packages we currently emit three kinds of tests:

• availability.zeek: Check that the analyzer can be loaded with zeek
• standalone.zeek: For adding spicyc/spicy-driver based unit tests
• trace.zeek: zeek-based test for Zeek events

We should consider adding a test which uses spicy-driver's batch files for testing without Zeek. Such a test could dynamically transform the test PCAP we already distribute to a batch file and then use spicy-driver. If we add sufficient documentation this might be enough to get users acquainted with batch files, and into a habit of using them.