Fix Sample jobs bug fixes

[gopi-databricks]

Fixes: #29

Issue:

Below sample jobs are failing currently:

1. Lakeflow Framework Samples - Run 1 - Load and Schema Initialization
2. Lakeflow Framework Samples - Run 2 - Load
3. Lakeflow Framework Samples - Run 3 - Load
4. Lakeflow Framework Samples - Run 4 - Load

What changes made?

1. Added schema_namespace param in the job resources YAML file to handle [TABLE_OR_VIEW_NOT_FOUND] error.
2. Added a new shell function to update global config file table_migration_volume path variable during deployment. At the end of the deployment, the global.json file will be reverted back (follows same pattern as updating substitution files). This fixes the error PERMISSION_DENIED: User does not have READ VOLUME on Volume stg_volume

Test:

Deployed the changes in databricks workspace. Below are the successful runs for reference

1. Lakeflow Framework Samples - Run 1 - Load and Schema Initialization
2. Lakeflow Framework Samples - Run 2 - Load
3. Lakeflow Framework Samples - Run 3 - Load
4. Lakeflow Framework Samples - Run 4 - Load