fix(core) : sync Observer 'current' properties when optimistic reading occurs (#5611)

* fix-5538 : sync Observer 'current' properties when optimistic reading occurs

* Flip test on currentResult with placeholderData's order & add test

* Fix tests using the same queryKey

* remove options.placeHolderData from deciding whether to assign observer current properties, use equalitycheck on v5

* maybe fix for vue reactivity cbs

* test(vue-query): test persister with useQuery

* Force line terminator to \\n on codemods tests

* Revert " Force line terminator to \\n on codemods tests"

This reverts commit 6f0a469f51e162052ea3245b4ef3da7c6febc9c3.

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Co-authored-by: Dominik Dorfmeister <office@dorfmeister.cc>
Co-authored-by: Damian Osipiuk <osipiukd+git@gmail.com>