This commit makes the detection engine thread context available for
transforms to use. The Lua transform requires this value.

Issue: 2290

Issue: 2290

This commit extends the hash table logic with an alternate free function
that provides the detection engine context.

Users that wish to use the next functionality must use the
HashListTableInitWithCtx function when initializing the hash table.
Using this interface will result in the hash table "free with context"
function (new) being used instead.

Issue: 2290

Defer freeing the keyword hash table until the engine context has
been freed. This eliminates a double-free from occurring.

For the unittests ONLY, clear the keyword_hash to prevent a double
free attempt.

Issue: 2290

This commit adds the source files for the new transform -- luaxform.

Issue: 2290

git grep -A 1 -w InspectionBufferSetup shows numbers cases of the pattern:
    - InspectionBufferSetup
    - InspectionBufferApplyTransforms

Refactor the implementations of those functions into
InspectionBufferSetupAndApplyTransforms to reduce function call count.

Issuer: 2290

Address clang-format issue with otherwise unchanged source file.