- Fix wrong lft, rgt and level value
- Remove unused asset for plugin
- Adapt rgt value of the root item to the new asset

When inserting values into a table with specifying the values for an auto-incremented ID column, the next value of the corresponding sequence has to be set on PostgreSQL databases.

The values for the "ordering" and  "state" are missing here, which causes an SQL error when installing Joomla on a PostgreSQL database.

On updates we do not create new assets, so we use asset_id zero for the records we insert on updates, see e.g. 4.0.0-2018-05-15.sql

See joomla/joomla-cms#37156 for details.

Explanation see description of commit joomla-projects@c1476f6 .

- Some code style fixes
- Be consistent with how you specify primary keys in MySQL
- On update, insert new extensions with one insert statement and use ordering 0

Add missing extensions record for the plugin for new installations on PostgreSQL

- The checked_out and checked_out_time columns meanwhile allow null values and so also should not have a default value.
- Use  data types consistent with other tables for these columns.

- Use correct data types in PostgreSQL.
- Remove "state" column which is not  used for MySQL either.

See joomla/joomla-cms#37156 for details.

The soundex function has to be the last thing in this file.

- Do not use wrong values for created and modified times.
- Do not use hardcoded user ID.

- Hardcoded MySQL names quotes in this query lead to an SQL error on PostgreSQL databases
- Added other missing names quotes

Remove wrong code possibly resulting from copy and paset

The database checker for PostgreSQL seems to have a problem when the opening bracket is in a new line. This has to be fixed elsewhere, For now adapt to this behavior.

…uided-tour into cleanup-fix-sql-2022-08-13