Improve workflow for building NGINX from source

[alessfg]

Proposed changes

BREAKING CHANGES:

• When building from source the various libraries required to build NGINX from source, you will no longer need to specify the name of the package, only the version:

  pcre_version: pcre2-10.42

  is now:

  pcre_version: 10.42

• The nginx_install_source_<package>: false parameters have been reversed. Setting nginx_install_source_pcre: true will now build PCRE from source, instead of using the default package manager. The previous behavior was unintuitive at best.

ENHANCEMENTS:

Use the official GitHub repositories as the source for the various packages required to compile NGINX OSS from source.

BUG FIXES:

Update the versions of the various packages required to build NGINX from source. The version of zlib listed in the role was no longer available. (Fixes #555.)

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have added Molecule tests that prove my fix is effective or that my feature works
• I have checked that any relevant Molecule tests pass after adding my changes
• I have updated any relevant documentation (defaults/main/*.yml, README.md and CHANGELOG.md)