Testsuite: Remove seldomly used testsuite targets
Testsuite: Remove seldomly used testsuite targets

This commit removes the seldomly used testsuite targets "clear_tests" and
"regen_rests".

Further, the remaining "setup_tests" and "prune_tests" are rewritten in
native CMake script

shakirbsm/dealii,angelrca/dealii,ibkim11/dealii,ibkim11/dealii,spco/dealii,shakirbsm/dealii,adamkosik/dealii,kalj/dealii,andreamola/dealii,adamkosik/dealii,gpitton/dealii,maieneuro/dealii,johntfoster/dealii,Arezou-gh/dealii,nicolacavallini/dealii,naliboff/dealii,nicolacavallini/dealii,YongYang86/dealii,shakirbsm/dealii,angelrca/dealii,gpitton/dealii,sairajat/dealii,spco/dealii,danshapero/dealii,sairajat/dealii,ibkim11/dealii,sriharisundar/dealii,rrgrove6/dealii,rrgrove6/dealii,sriharisundar/dealii,rrgrove6/dealii,EGP-CIG-REU/dealii,gpitton/dealii,lue/dealii,gpitton/dealii,ibkim11/dealii,ESeNonFossiIo/dealii,angelrca/dealii,naliboff/dealii,rrgrove6/dealii,sairajat/dealii,spco/dealii,sriharisundar/dealii,spco/dealii,YongYang86/dealii,naliboff/dealii,danshapero/dealii,rrgrove6/dealii,YongYang86/dealii,nicolacavallini/dealii,spco/dealii,naliboff/dealii,ESeNonFossiIo/dealii,maieneuro/dealii,ibkim11/dealii,naliboff/dealii,lue/dealii,pesser/dealii,maieneuro/dealii,Arezou-gh/dealii,andreamola/dealii,adamkosik/dealii,angelrca/dealii,danshapero/dealii,lue/dealii,rrgrove6/dealii,andreamola/dealii,pesser/dealii,YongYang86/dealii,spco/dealii,danshapero/dealii,naliboff/dealii,lue/dealii,sairajat/dealii,ESeNonFossiIo/dealii,kalj/dealii,shakirbsm/dealii,pesser/dealii,gpitton/dealii,adamkosik/dealii,sriharisundar/dealii,sairajat/dealii,kalj/dealii,adamkosik/dealii,pesser/dealii,johntfoster/dealii,danshapero/dealii,andreamola/dealii,EGP-CIG-REU/dealii,pesser/dealii,jperryhouts/dealii,spco/dealii,angelrca/dealii,ibkim11/dealii,johntfoster/dealii,mac-a/dealii,sriharisundar/dealii,johntfoster/dealii,ibkim11/dealii,ESeNonFossiIo/dealii,EGP-CIG-REU/dealii,danshapero/dealii,adamkosik/dealii,shakirbsm/dealii,Arezou-gh/dealii,jperryhouts/dealii,gpitton/dealii,johntfoster/dealii,angelrca/dealii,JaeryunYim/dealii,Arezou-gh/dealii,kalj/dealii,Arezou-gh/dealii,jperryhouts/dealii,Arezou-gh/dealii,JaeryunYim/dealii,mac-a/dealii,JaeryunYim/dealii,YongYang86/dealii,andreamola/dealii,EGP-CIG-REU/dealii,nicolacavallini/dealii,ESeNonFossiIo/dealii,jperryhouts/dealii,maieneuro/dealii,sriharisundar/dealii,gpitton/dealii,jperryhouts/dealii,kalj/dealii,jperryhouts/dealii,pesser/dealii,YongYang86/dealii,johntfoster/dealii,JaeryunYim/dealii,mac-a/dealii,ESeNonFossiIo/dealii,Arezou-gh/dealii,sairajat/dealii,YongYang86/dealii,nicolacavallini/dealii,ESeNonFossiIo/dealii,lue/dealii,pesser/dealii,naliboff/dealii,jperryhouts/dealii,andreamola/dealii,maieneuro/dealii,shakirbsm/dealii,JaeryunYim/dealii,EGP-CIG-REU/dealii,lue/dealii,maieneuro/dealii,mac-a/dealii,lue/dealii,mac-a/dealii,JaeryunYim/dealii,johntfoster/dealii,adamkosik/dealii,kalj/dealii,maieneuro/dealii,angelrca/dealii,sairajat/dealii,andreamola/dealii,EGP-CIG-REU/dealii,rrgrove6/dealii,mac-a/dealii,JaeryunYim/dealii,EGP-CIG-REU/dealii,nicolacavallini/dealii,shakirbsm/dealii,kalj/dealii,sriharisundar/dealii,nicolacavallini/dealii,mac-a/dealii,danshapero/dealii