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81dabd53 - Update Rust toolchain to 1.96 and MSRV to 1.94 (#19600)

Update Rust toolchain to 1.96 and MSRV to 1.94 (#19600) ## Summary Update the MSRV to 1.94.0, the pinned Rust toolchain to 1.96.0, and the trampoline nightly toolchain to remain compatible with the new MSRV.