General btest cleanup

- Use `-b` most everywhere, it will save time.

- Start some intel tests upon the input file being fully read instead of
  at an arbitrary time.

- Improve termination condition for some sumstats/cluster tests.

- Filter uninteresting output from some supervisor tests.

- Test for `notice_policy.log` is no longer needed.

testing/btest/scripts/base/frameworks/software/version-parsing.zeek

@@ -1,6 +1,8 @@
-# @TEST-EXEC: zeek %INPUT > output
+# @TEST-EXEC: zeek -b %INPUT > output
 # @TEST-EXEC: TEST_DIFF_CANONIFIER=$SCRIPTS/diff-sort btest-diff output
 
+@load base/frameworks/software
+
 module Software;
 
 global matched_software: table[string] of Software::Description = {