Theodw 2917 part 1 convert curated managed tables to external tables in curated layer

[anushaveerapalli68]

JIRA Ticket Reference:https://pins-ds.atlassian.net/browse/THEODW-2917

• Updated curated‑layer notebooks to preserve external table behaviour during overwrite operations.
• Retrieved the existing table path using DESCRIBE EXTENDED <table_name>.
• Extracted the Location value and stored it as table_path.
• Added .option("path", table_path) to the DataFrame write operation.
• Ensures Spark writes back to the existing external directory instead of creating a managed table.
• Prevents curated tables from being unintentionally recreated as managed tables.
• Curated tables now consistently remain external with their original storage paths retained.

[roytalari]

looks good