Update function-schemata sub-module to HEAD (2e912e6)

New changes:
a8427df definitions: Add more pre-defined testers for basic built-in functions
d5ae60b tests: Switch ZID for generic list type from temporary Z1010 to final Z881
c366717 Test validity of inner ZObject of data definitions

Bug: T289094
Bug: T291650
Bug: T292260
Bug: T294944
Change-Id: Idda658fb611d920fe36f565d5f26fcfd6257e872