MIGraphX EP: Add set_false_math to false by default (#20520)
Patching in fast match disabled in the MIGraphX Compile stage in the
MIGraphX EP
### Description
Allow the MIGraphX API to compile the program given to the EP to turn
off fast math by default.
### Motivation and Context
Fixes accuracy issue we're seeing with GELU parity tests. Without fast
math disabled GELU will use a faster but less numerically stable version
which trades speed for accuracy.
Co-authored-by: Ted Themistokleous <tedthemistokleous@amd.com>