Fix platform-dependent warning in controller_interface_base.cpp using fmt::format (backport #2880)

[mergify]

Description

This PR updates a RCLCPP_WARN_EXPRESSION call in controller_interface_base.cpp to use fmt::format instead of printf-style formatting.

Changes

• Replaced %ld/%d format specifiers with fmt::format for platform-independent logging.
• Preserved the original logic: ctrl_itf_params_.update_rate is updated to achievable_hz only if the requested update rate is not achievable.
• Ensures consistent behavior across different platforms and avoids compilation warnings on macOS and other systems.

Motivation

Printf-style format specifiers can cause warnings or undefined behavior depending on the platform (e.g., long vs int64_t). Using fmt::format ensures type safety and platform independence while keeping the original functionality.

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This is an automatic backport of pull request #2880 done by [Mergify](https://mergify.com).