update(userspace/engine): cleanup unused alternate-lua-dir option and remove config_falco_engine.h.in, now unused since lua scripts are embedded in Falco.

[FedeDP]

Signed-off-by: Federico Di Pierro nierro92@gmail.com

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update!: removed "--alternate-lua-dir" cmdline option as lua scripts are now embedded in Falco executable.

[leogr]

/milestone 0.31.0

[jasondellaluce]

/approve

[poiana]

LGTM label has been added.

Git tree hash: 0c31fb57d817aa00313fca706185d092d7967b44

[leogr]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

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