Fix/2802 support for mysql invisible attribute

[yoavweber]

Description

This pull request fixes Issue #2802 by supporting the INVISIBLE column attribute in MySQL.

Main Changes

• Adjust the parseExtra to support mul multiple attribute values in "extra" column using regex
• Adjusting inspect to support invisible attribute
• Adjusting migrate and sqlspec to support invisible attribute
• Adjusting and adding relevant test

How to Test

1. Create a Docker Compose File

   In the root directory of your project, create a docker-compose.yml file with the following content:

   version: '3.8'
   
   services:
     mysql:
       image: mysql:8.0
       container_name: mysql_atlas_bug_test
       restart: unless-stopped
       environment:
         MYSQL_ROOT_PASSWORD: rootpassword
         MYSQL_DATABASE: atlas_bug_test
         MYSQL_USER: testuser
         MYSQL_PASSWORD: testpassword
       ports:
         - "3306:3306"
       volumes:
         - ./mysql/init:/docker-entrypoint-initdb.d
         - mysql_data:/var/lib/mysql
       command: --default-authentication-plugin=mysql_native_password
   
   volumes:
     mysql_data:

2. Add the Schema

   In the root directory, create a folder named mysql/init and add a SQL file (e.g., init.sql) with the following content:

   USE atlas_bug_test;
   
   CREATE TABLE users (
       id INT AUTO_INCREMENT PRIMARY KEY,
       username VARCHAR(50) NOT NULL,
       email VARCHAR(100) NOT NULL,
       email_length INT GENERATED ALWAYS AS (CHAR_LENGTH(email)) STORED INVISIBLE
   );

3. Compile the Code

   Compile your Atlas project to ensure all changes are built.

4. Run the Inspection Command

   Execute the following command to inspect the schema:

   atlas schema inspect --url mysql://testuser:testpassword@localhost:3306/atlas_bug_test > schema.atlas

[calmdev]

I was running into this issue on four different MySQL databases.

Building against this branch I was able to process those tables and no longer encounter the error:

mysql: unknown extra column attribute "DEFAULT_GENERATED INVISIBLE"