max_memory_usage_in_client command line option supports string suffix values

Why it matters

This feature simplifies specifying memory limits by allowing users to provide human-readable memory size strings instead of raw byte values, improving usability and reducing errors when configuring client memory usage limits.

How to use it

Set the max_memory_usage_in_client option using a string with suffixes to indicate memory size. For example: --max_memory_usage_in_client=512M, 1G, or 1024K.