GMT.jl asserts on 1.11 backport branch

[KristofferC]

On c2dcb7e

https://s3.amazonaws.com/julialang-reports/nanosoldier/pkgeval/by_hash/f51eeca_vs_ec84807/GMT.primary.log

julia: /source/src/julia.h:1113: jl_svecref: Assertion `(((((jl_taggedvalue_t*)((char*)(t) - sizeof(jl_taggedvalue_t)))->header) & ~(uintptr_t)15)==(uintptr_t)(jl_simplevector_tag << 4))' failed.

[250] signal 6 (-6): Aborted
in expression starting at /home/pkgeval/.julia/packages/GMT/KSmVP/test/test_avatars.jl:3

[vtjnash]

I assume this is still the many known issues with GMT? #47003 (comment)