ci: adopt dynamic cpu backends on released binaries

[wbruna]

Summary

Switches build options on all released binaries to use dynamic ggml backends, enables multiple CPU variants, and replaces noavx/avx/avx2/avx512 variants with a single one.

This should fix recurrent issues where specific Github CI builders release binaries that assume AVX2 or AVX512, and enable compatibility with several CPU generations in all our builds.

Related Issue / Discussion

To be honest, I'm not used to the Github release process, so there could be bugs with the non-Linux releases, or the Docker image generation. I was only able to test the released Linux binaries; I've made a test build on my own fork some time ago (details on #1589 ).

Related to #1591 .

Should fix: #1343 , #1351 , #1483 , #1588 , #1589 , #1695 .

Additional Information

Checklist

• I have read and confirmed this PR follows the contribution guidelines.

[wbruna]

https://github.com/leejet/stable-diffusion.cpp/actions/runs/28211388692/job/83573270446#step:10:1567 :

cc1: error: invalid feature modifier 'sme' in '-march=armv9.2-a+dotprod+fp16+sve+i8mm+sme'
cc1: note: valid arguments are: fp simd crc lse fp16 rcpc rdma dotprod aes sha2 crypto sha3 sm4 fp16fml sve profile rng memtag sb ssbs predres sve2 sve2-sm4 sve2-aes sve2-sha3 sve2-bitperm tme i8mm f32mm f64mm bf16 flagm pauth ls64 mops cssc; did you mean 'sm4'?
gmake[2]: *** [ggml/src/CMakeFiles/ggml-cpu-armv9.2_1.dir/build.make:76: ggml/src/CMakeFiles/ggml-cpu-armv9.2_1.dir/ggml-cpu/ggml-cpu.c.o] Error 1

@leejet , I've found this: ggml-org/llama.cpp#17403 . Looks like -DGGML_CPU_ALL_VARIANTS=ON on ARM needs either a newer gcc, or a ggml patch.