meson: Fix pkgconfig detection when specified in machine file

When pkgconfig and pkg_config_path are specified in the machine file, we need to parse those and pass them on to the cargo_wrapper.

added Needs backport label

added 1 commit

• f99e6654 - meson: Fix pkgconfig detection when specified in machine file

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approved this merge request

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assigned to @gstreamer-merge-bot

mentioned in commit nirbheek/gst-plugins-rs@a507f246

mentioned in commit nirbheek/gst-plugins-rs@985e3e85

added 22 commits

• f99e6654...620ba6e1 - 20 commits from branch gstreamer:main
• 985e3e85 - meson: Do not serialize env, use env: kwarg
• a507f246 - meson: Fix pkgconfig detection when specified in machine file

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merged

mentioned in commit slomo/gst-plugins-rs@bd6d9e49

mentioned in commit slomo/gst-plugins-rs@601799b7

removed Needs backport label