feat(datasource): Add datasource for buildpack registry (#32721)

Co-authored-by: Nicolas Bender <nicolas.bender@sap.com>
Co-authored-by: HonkingGoose <34918129+HonkingGoose@users.noreply.github.com>
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Co-authored-by: Pavel Busko <pavel.busko@sap.com>
Co-authored-by: Johannes Dillmann <j.dillmann@sap.com>
Co-authored-by: Michael Kriese <michael.kriese@gmx.de>