[REF][php8-compat] Fix more instances of where there is a required pa… #20497
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…rameter for a function after an optional one and fix an issue where by a NULL function property is treated as not exisiting in php8
Overview
Title says it all
Before
PHP8 Errors generated in unit tests
After
Less PHP8 Errors generated
ping @eileenmcnaughton @totten @demeritcowboy