fix(cmake): enable webserver deps on macOS (httplib include/link)

[yoderme]

Root CMake skipped openssl/curl/cpp-httplib and c-ares on APPLE while state.h still included webserver.h on all non-Windows Unix builds, causing missing httplib.h on Darwin. Align userspace/falco targets with those conditions, fix FALCO_INCLUDE_DIRECTORIES typo, and gate CPPHTTPLIB_OPENSSL_SUPPORT with the webserver block.

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/kind bug

/kind cleanup

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What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #3831

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

fix(cmake): enable webserver deps (httplib) on macOS

[poiana]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[poiana]

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

[leogr]

/milestone 0.44.0

[poiana]

Thanks for your pull request. Before we can look at it, you'll need to add a 'DCO signoff' to your commits.

📝 Please follow instructions in the contributing guide to update your commits with the DCO

Full details of the Developer Certificate of Origin can be found at developercertificate.org.

The list of commits missing DCO signoff:

• eaa4e7e Fixing cmake formatting

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[leogr]

Thanks for your pull request. Before we can look at it, you'll need to add a 'DCO signoff' to your commits.

📝 Please follow instructions in the contributing guide to update your commits with the DCO

Full details of the Developer Certificate of Origin can be found at developercertificate.org.

The list of commits missing DCO signoff:

• eaa4e7e Fixing cmake formatting

Details

Hey @yoderme

The last commit is missing the DCO signoff. To fix it, you should run something like this:

git rebase --signoff -i upstream/master

(this assumes you forked this repository and the upstream remote is called upstream, if not change it accordingly).

Thanks