feat(docker/no-driver/Dockerfile.no-falcoctl-distroless): Provide distroless falco image without falcoctl

[killerkenobi]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

/kind release

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area build

/area engine

/area tests

/area proposals

/area CI

What this PR does / why we need it:
This PR introduces a new Docker image that builds the Falco application without falcoctl present in said image. People could build Falco using this Docker image if they are operating Falco in a sensitive environment or just don't want/need falcoctl. This proposed Dockerfile can also reduce the attack surface introduced by falcoctl in the Falco image.

Which issue(s) this PR fixes:

Related to points made in #3165

Special notes for your reviewer:
After reading through #3165 I noticed that there is a proposal to depreciate the Falco distroless image. I figured I would open this PR anyway to help with the dev work / show that there is interest in having a Falco image that does not contain falcoctl.

Does this PR introduce a user-facing change?:

feat(docker/no-driver/Dockerfile.no-falcoctl-distroless): Users now have the option to build the Falco Docker image without installing falcoctl.

[poiana]

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[poiana]

Welcome @killerkenobi! It looks like this is your first PR to falcosecurity/falco 🎉

[FedeDP]

Hi! Thanks for this PR!
Yes, #3165 wants to deprecate old distroless image BUT because the falco main image would become a distroless one; see the first table:

falcosecurity/falco x.y.z (latest) Distroless image without driver building toolchain support, based on the latest released tar.gz of Falco. No tools or falcoctl not included.

I don't think we will be able to tackle #3165 for the 0.38.0 release, but we will for sure for the 0.39.0.

cc @leogr

[FedeDP]

/milestone TBD