Pin tensor4all-rs published inject deps

[shinaoka]

Summary

• pin tensor4all-rs to tensor4all/tensor4all-rs@21d1fd6
• carry the tenferro published cblas-inject 0.1.1 / lapack-inject 0.1.2 dependency source into the default julia-blas build

Verification

• build_config test passed with one-thread environment
• default pinned julia-blas deps/build.jl completed from a fresh GitHub clone
• exported inject registration symbols were present in deps/libtensor4all_capi.so
• Tensor4all.require_backend() loaded the pinned julia-blas backend
• T4A_SKIP_HDF5_TESTS=1 test/runtests.jl passed