[SPIR-V] GET_ID instruction generated after the instruction using its result

[Keenuts]

MIR register usage must be dominated by their definitions.
The SPIR-V backend generates the instruction after the user, meaning we break this requirement.

Seems like the fix is in SPIRVPreLegalizer.cpp, the setInsertPt call might have the wrong param.

[Keenuts]

Fixed with #109686