fix Column 'customer_id' in where clause is ambiguous,

[BeardTech]

Description (*)

Add main_table to select for customer online filter.

Fixed Issues (if relevant)

When we try to filter the online customer grid we have an issue :

Integrity constraint violation: 1052 Column 'customer_id' in where clause is ambiguous, query was: SELECT `main_table`.*, `customer`.`email`, `customer`.`firstname`, `customer`.`lastname`, IF(main_table.customer_id IS NOT NULL AND main_table.customer_id != 0, 'c', 'v') AS `visitor_type`, `company_customer`.`company_id`, `company`.`company_name` FROM `customer_visitor` AS `main_table` LEFT JOIN `customer_entity` AS `customer` ON customer.entity_id = main_table.customer_id LEFT JOIN `company_advanced_customer_entity` AS `company_customer` ON main_table.customer_id = company_customer.customer_id LEFT JOIN `company` ON company.entity_id = company_customer.company_id WHERE (main_table.last_visit_at >= '2023-07-28 09:34:09') AND (((`customer_id` > 0))) ORDER BY customer_id ASC LIMIT 20 in /app/vendor/magento/framework/DB/Statement/Pdo/Mysql.php:109

Manual testing scenarios (*)

1. In admin Navigate to customers -> Now Online
2. Try to filter "type" -> value "customer"
3. Enjoy

Contribution checklist (*)

• [ ] Pull request has a meaningful description of its purpose
• [ ] All commits are accompanied by meaningful commit messages
• [ ] All new or changed code is covered with unit/integration tests (if applicable)
• [ ] README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• [ ] All automated tests passed successfully (all builds are green)

Resolved issues:

1. [x] resolves magento/magento2#37822: fix Column 'customer_id' in where clause is ambiguous,