Change all PDS-Solutions to new ENV location variable and revoke old one

[de-jcup]

Situation

With #1309 we introduced PDS_JOB_EXTRACTED_SOURCES_FOLDER. The old environment variable PDS_JOB_SOURCECODE_UNZIPPED_FOLDER was still kept, but with the new location inside. So existing PDS solutions will work.

Wanted

PDS_JOB_SOURCECODE_UNZIPPED_FOLDER shall no longer be used.

Solution

• [x] Replace in all PDS-Solutions the environment variable PDS_JOB_SOURCECODE_UNZIPPED_FOLDER with PDS_JOB_EXTRACTED_SOURCES_FOLDER.
• [ ] After this, remove PDS_JOB_SOURCECODE_UNZIPPED_FOLDER from PDSExecutionCallable

[sven-dmlr]

@de-jcup pds-solutions part is done. Please take over for the Java part.