7.x - Add ability to load squashed tenant schema from SQL file

[jackhealy1]

Title: feat: Add ability to load squashed tenant schema from SQL file

Description:

This pull request introduces a new feature that allows for a squashed database schema of a tenant to be loaded from a
single "squashed" SQL file. This is particularly useful for applications with a large number of migrations, as it can
significantly speed up the tenant setup process.

Key Changes:

1. New Configuration Option:

   • A new configuration option, tenancy.db.tenant-squashed-sql-path, is introduced. This can be set in the
     config/tenancy.php file.

2. Updated Database Creation Logic:

   • The MariaDB database driver, used for MySQL/MariaDB connections, has been modified.
   • Immediately after a new tenant database is created, the system checks for the tenant-squashed-sql-path configuration.

3. SQL Import Process:

   • If the specified .sql file exists, its contents are executed against the new tenant database.
   • This import happens before any standard tenant migrations are run.

4. Robustness and Error Handling:

   • Optional Feature: If the path is not configured or the file doesn't exist, this step is silently and safely skipped.
   • Error Logging: The process is wrapped in a try...catch block. If the SQL file contains errors, the exception is logged,
     and the tenant creation process is halted to prevent a corrupt installation.
   • Success Logging: A success message is logged when the file is imported correctly.

How to Use:

1. Add the tenant-squashed-sql-path key to the db array in your config/tenancy.php file.
2. Set its value to the absolute path of your squashed schema file (e.g., database_path('schema/tenant-schema.sql')).

[rayblair06]

LGTM!