* restrict curve25519 multiscalar multiplication vector length to 512
* add syscall tests for msm vector length
* add new feature gate `curve25519_restrict_msm_length`
* update tests for feature new gate
* Update programs/bpf_loader/src/syscalls/mod.rs
Co-authored-by: Trent Nelson <trent.a.b.nelson@gmail.com>
* remove length guard on the multisicalar mult lib function
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Co-authored-by: Trent Nelson <trent.a.b.nelson@gmail.com>
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