feat(susie_finemapper): ensure proper output paths

[project-defiant]

Context

This PR resolves 2 issues with the output paths from finemapping of ukb_ppp_eur datasource.

❯ gsutil ls 'gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5*'
gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5c.log

gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5c/:
gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5c/
gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5c/_SUCCESS
gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5c/part-00000-e1d26427-69b6-473b-a6fb-d5c470f28280-c000.snappy.parquet
gs://ukb_ppp_eur_data/credible_set_datasets/susie/studyLocusId=f6c6edb08ed02502869faea2d46e7c5c/part-00003-e1d26427-69b6-473b-a6fb-d5c470f28280-c000.snappy.parquet

Finemapping results from ukb_ppp_eur contained log file and finemapped loci parquet in the same directory, which could cause trouble when reading the loci files.

The output path of the finemapping results contained the studyLocusId=XXX segment that was inferred by spark, as if the dataset was partitionned by studyLocusId column but in reality it was not partitionned at all.

see more info in opentargets/gentropy#859

This PR attempts to:

• Change the output path of the finemapping loci to stop being evaluated as a partition. The studyLocusId= is being removed from the prefix path.
• Introduced the log_path parameter that will be used as a base path to the finemapping logs
• Removed task to move logs after the finemapping batch job.