libgpiod: new package (#47724)

* Initial checkin of compile file for the package libgpiod, this covers versions, 1.6.3 through 2.2

* Update var/spack/repos/builtin/packages/libgpiod/package.py

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

* Update var/spack/repos/builtin/packages/libgpiod/package.py

Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>

* Update how version to url is manage in the x.y.0 cases based on fix by @wdconinc

* Remove redundant url at the top since it is now inside url_for_version function

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Co-authored-by: Wouter Deconinck <wdconinc@gmail.com>