Add VRT test for validating that split transaction rules work as expected (#2604)

* Add UI test for validating that split transaction rules work as expected

* Apply suggestions from code review

Renames split-transactions-add to add-split-transactions

Co-authored-by: Joel Jeremy Marquez <joeljeremy.marquez@gmail.com>

* Define id for finding splitactions on the page wher its used

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Co-authored-by: Joel Jeremy Marquez <joeljeremy.marquez@gmail.com>