clean up folder used as pseudo branches of voltha pipeline-scripts

* delete all folders used as pseudo branches for older voltha releases
  (including the unused playground) since those pipeline-scripts are now
  pulled in from the respective release branches for ci-management and
  are not needed in master anymore
* move all files from pseudo branch jjb/pipeline/voltha/master folder to
  jjb/pipeline/voltha folder to remove the mention of a branch in the
  script repo path
* remove 'master/' from path for all active pipeline scripts
* remove makefile used previously to copy folders as pseudo branches for
  releases

Signed-off-by: Jan Klare <jan.klare@bisdn.de>
Change-Id: Ib2f93ec021d0e12f70d550ccadd812c6408bf1ce
Signed-off-by: Jan Klare <jan.klare@bisdn.de>
diff --git a/jjb/voltha-test/voltha-nightly-jobs.yaml b/jjb/voltha-test/voltha-nightly-jobs.yaml
index 1a5d03a..21a702a 100644
--- a/jjb/voltha-test/voltha-nightly-jobs.yaml
+++ b/jjb/voltha-test/voltha-nightly-jobs.yaml
@@ -226,7 +226,7 @@
 
     <<: *voltha-pipe-job-boiler-plate
     # default values
-    pipeline-script: 'voltha/master/physical-build.groovy'
+    pipeline-script: 'voltha/physical-build.groovy'
     VolthaEtcdPort: 2379
     num-of-openonu: 1
     num-of-onos: 1
@@ -277,7 +277,7 @@
 
     <<: *voltha-pipe-job-boiler-plate
     # default values
-    pipeline-script: 'voltha/master/physical-build.groovy'
+    pipeline-script: 'voltha/physical-build.groovy'
     VolthaEtcdPort: 2379
     num-of-openonu: 1
     num-of-onos: 3
@@ -390,7 +390,7 @@
                   Copyright 2017-2023 Open Networking Foundation (ONF) and the ONF Contributors
 
     <<: *voltha-pipe-job-boiler-plate
-    pipeline-script: 'voltha/master/voltha-physical-functional-tests.groovy'
+    pipeline-script: 'voltha/voltha-physical-functional-tests.groovy'
     pipeline-branch: 'master'
     manifest-url: 'https://gerrit.opencord.org/voltha-test-manifest.git'
     manifest-branch: 'master'
@@ -695,7 +695,7 @@
                   Copyright 2017-2023 Open Networking Foundation (ONF) and the ONF Contributors
 
     <<: *voltha-pipe-job-boiler-plate
-    pipeline-script: 'voltha/master/voltha-physical-functional-tests.groovy'
+    pipeline-script: 'voltha/voltha-physical-functional-tests.groovy'
     pipeline-branch: 'master'
     manifest-url: 'https://gerrit.opencord.org/voltha-test-manifest.git'
     manifest-branch: 'master'
@@ -841,7 +841,7 @@
                   Copyright 2017-2023 Open Networking Foundation (ONF) and the ONF Contributors
 
     <<: *voltha-pipe-job-boiler-plate
-    pipeline-script: 'voltha/master/voltha-physical-functional-tests.groovy'
+    pipeline-script: 'voltha/voltha-physical-functional-tests.groovy'
     pipeline-branch: 'master'
     manifest-url: 'https://gerrit.opencord.org/voltha-test-manifest.git'
     manifest-branch: 'master'
@@ -987,7 +987,7 @@
 
     <<: *voltha-pipe-job-boiler-plate
     # default values
-    pipeline-script: 'voltha/master/dmi-build-and-test.groovy'
+    pipeline-script: 'voltha/dmi-build-and-test.groovy'
     installVolthaInfra: true
     installVolthaStack: true
     VolthaEtcdPort: 2379