Correcting the pims_split metadata and dag files to iterate over the splits

Added an iteration over {{#splits}} to the metadata file and removed an unnecessary check of the quicklook_url in the dag (it's okay to pass an empty string there).

The splits entry should look like:

"splits": [
    {
        "split_dir": {{split_dir}},
        "quicklook_url": {{quicklook_url}}
    },
]

shared/workspaces/alembic/versions/762c98a8adf1_pims_split_quicklook_corrections.py

@@ -112,6 +112,13 @@ def upgrade():
     """
     )
 
+    op.execute(
+        f"""
+        UPDATE workflow_templates
+        SET content = replace(convert_from(content, 'utf8'), E'{old_condor_args}', E'{new_condor_args}')::bytea
+        WHERE workflow_name = 'pims_split' AND filename = 'split.condor'
+    """)
+
     op.execute(
         f"""
         UPDATE workflow_templates
@@ -130,6 +137,13 @@ def downgrade():
     """
     )
 
+    op.execute(
+        f"""
+        UPDATE workflow_templates
+        SET content = replace(convert_from(content, 'utf8'), E'{new_condor_args}', E'{old_condor_args}')::bytea
+        WHERE workflow_name = 'pims_split' AND filename = 'split.condor'
+    """)
+
     op.execute(
         f"""
         UPDATE workflow_templates