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<https://github.com/The-OpenROAD-Project/OpenLane/pull/1623|#1623 Fix loading design configs>
Pull request opened by <https://github.com/kareefardi|kareefardi>
also fix lappend usage in remove_nets

Resolves <https://github.com/The-OpenROAD-Project/OpenLane/issues/1616|#1616>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>
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<https://github.com/The-OpenROAD-Project/OpenLane/pull/1623|#1623 set PDKPATH before sourcing user configuration>
Pull request ready for review by <https://github.com/kareefardi|kareefardi>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>

<https://github.com/The-OpenROAD-Project/OpenLane/pull/1623|#1623 Fix loading design configs>
Pull request merged by <https://github.com/donn|donn>
<https://github.com/The-OpenROAD-Project/OpenLane|The-OpenROAD-Project/OpenLane>