Fix instances of ints passed to functions expecting strings

Problem/Motivation

This is a child issue of #3404246: [META] Fix strict type errors detected by phpstan in order to reduce the scope.

The scope includes any issues detected by FunctionCallParametersCheck where the function is expecting a string but receiving an int.

Steps to reproduce

See the parent issue.

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes

Release notes snippet