libpcap: honor profile in CMake build + relocatable shared lib on macOS + modernize

[SpaceIm]

• relocatable shared libs on macOS: see [conan-center] Add a hook to check whether installed shared libs are relocatable on Linux & macOS hooks#376
• honor profile in CMake build: see libpcap goes windows #7769 (comment)

This recipe has other issues I don't want to fix here (like not properly preventing to build against a system installed openssl).

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• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the
  conan-center hook activated.

[conan-center-bot]

All green in build 2 (4f0e2a855b17d7c803e447dac6fa3c66defbfe61):

• libpcap/1.10.1@:
  All packages built successfully! (All logs)

• libpcap/1.10.0@:
  All packages built successfully! (All logs)

• libpcap/1.9.1@:
  All packages built successfully! (All logs)

[ghost]

I detected other pull requests that are modifying libpcap/all recipe:

• [libpcap] add option to build with or without dpdk #9264

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.