CP-16984 phql update set

[niden]

Hello!

• Type: bug fix
• Link to issue: [NFR] UPDATE query with JOIN in PHQL #16984

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• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist
• I wrote some tests for this PR
• I have updated the relevant CHANGELOG
• I have created a PR for the documentation about this change

Added support for JOIN clauses in PHQL UPDATE statements (e.g. UPDATE Invoices INNER JOIN Customers ON ... SET ... WHERE Customers.cst_id = :id:). The join is used to filter the records to update; the statement still targets a single model. #16984 [doc]

Thanks