packaging rework + build GithubAction

[EvgeniyPatlan]

Build both package families offline from prefetched dependency sources: Boost and the AWS SDK are shallow-cloned at the tags named in the RPM spec, pruned of everything the build never compiles and packed alongside the product tarball, then consumed as Source1/Source2 in the spec and as additional orig tarballs in the deb source package.

Build the dependencies once per package instead of twice and link both binlog_server configurations against them, restrict Boost to the modules the sources include, and replace every in-tree sed on CMakePresets.json with command line overrides.

Declare BuildRequires and Build-Depends, add ${shlibs:Depends} so the deb declares the libraries it links against, run the unit tests in %check and dh_auto_test, own /etc/percona-binlog-server, and add debian/copyright.

Restructure the builder script into sections with a main(), split install_deps into per-family functions, deduplicate artifact lookup and publishing, and run it under set -eu.

Add .github/workflows/packages.yml, mirroring the Jenkins pipeline without signing or repository upload, publishing every package as a downloadable artifact.

Fixes: the script was not executable and failed under its own /bin/sh shebang, install_deps picked the wrong compiler on jammy and bullseye, cmake3 does not exist on the EL9 and EL10 targets, --deb_release was ignored for binary packages, build_deb used a default version instead of the one in the .dsc and could build from a stale tree, and the AWS CRT submodule check failed when the build tree sat inside a git repository.