feat: adjust postgresql configuration before logical restore (#270)

Description

Adjust postgresql configuration before logical restore:

• add init and start Postgres functions to run with extended images
• provide ability to adjust PostgreSQL configuration for logical dump/restore jobs

Related issue

#270 (closed)

Examples

...
    logicalRestore:
      options:
        dbname: "test"
        dumpLocation: "/var/lib/dblab/dblab_pool/dump"
        dockerImage: "postgresai/extended-postgres:13"
        forceInit: true
        configs:
          shared_preload_libraries: "pg_stat_statements, auto_explain, pgaudit, logerrors, pg_stat_kcache"
...

Checklist

• the MR description has been reviewed
• this MR contains text changes and they have been reviewed OR there are no texts changes
• this MR contains GUI/CLI changes and they have been reviewed OR there are no GUI/CLI changes
• this MR contains API changes, specifications reflect those changes and they have been reviewed OR there are no API changes

Closes #270 (closed)