make `verify_ir` error messages more informative (#56452)
Currently, when `verify_ir` finds an error, the `IRCode` is printed, but
it's not easy to determine which method instance generated that
`IRCode`. This commit adds method instance and code location information
to the error message, making it easier to identify the problematic code.
E.g.:
```julia
[...]
610 │ %95 = builtin Core.tuple(%48, %94)::Tuple{GMT.Gdal.IGeometry, GMT.Gdal.IGeometry}
└─── return %95
ERROR: IR verification failed.
Code location: ~/julia/packages/GMT/src/gdal_extensions.jl:606
Method instance: MethodInstance for GMT.Gdal.helper_2geoms(::Matrix{Float64}, ::Matrix{Float64})
Stacktrace:
[1] error(::String, ::String, ::String, ::Symbol, ::String, ::Int32, ::String, ::String, ::Core.MethodInstance)
@ Core.Compiler ./error.jl:53
[...]
```
