[11.x] Enhance DB inspection commands

[hafezdivandari]

This PR enhances DB inspection commands:

• On db:show command:
  • Fixes connection name hadn't been displayed.
  • Fixes zero table's size hadn't been displayed.
  • Fixes Artisan db:show and db:table fails when database has tables in multiple schemas #52496: the db:show --counts command was failing when table is not on the default schema.
  • Fixes db:show --views wasn't showing views' rows counts.
• On db:table command:
  • Adds support for schema names (pgsql and sqlsrv), now lists full table names: schema.table.
  • Displays more table info when available: table's comment (pgsql and mysql), engine (mysql), and collation (mysql).
  • Displays column's generation type for generated columns, "stored" or "virtual" (all DBs)
  • Fixes zero table's size hadn't been displayed.

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[bjuppa]

Very nice @hafezdivandari, thank you for this PR! It definitely solves the issues I described in #52496, and more!