refactor(protocol/sandbox): migrate to Wasmtime

[ark0f]

Resolves #5432

• Check node sync

NOTE: Substrate's Wasmtime is also updated

NOTE: our published crates on crates.io still use Wasmtime 8 - #5485

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
utils/gear-replay-cli/src/cmd/mod.rs	99% smaller
utils/wasm-optimizer/src/cargo_toolchain.rs	63% smaller
utils/calc-stack-height/src/main.rs	59% smaller
utils/lazy-pages-fuzzer/src/wasmtime_backend.rs	52% smaller
sandbox/host/src/store_refcell.rs	52% smaller
utils/cargo-gbuild/src/command.rs	51% smaller
lazy-pages/src/sys/windows.rs	44% smaller
pallets/gear/src/tests.rs	43% smaller
utils/wasm-optimizer/src/stack_end.rs	41% smaller
runtime-interface/sandbox/src/detail.rs	39% smaller
utils/lazy-pages-fuzzer/runner/src/main.rs	38% smaller
sandbox/sandbox/src/embedded_executor.rs	29% smaller
lazy-pages/src/lib.rs	22% smaller
node/authorship/src/tests.rs	17% smaller
sandbox/host/src/sandbox.rs	12% smaller
core/backend/src/env.rs	10% smaller
.config/hakari.toml	Unsupported file format
Cargo.lock	Unsupported file format
Cargo.toml	Unsupported file format
ethexe/processor/src/host/api/mod.rs	0% smaller
ethexe/processor/src/host/mod.rs	0% smaller
gstd/Cargo.toml	Unsupported file format
lazy-pages/Cargo.toml	Unsupported file format
lazy-pages/interface/src/lib.rs	0% smaller
lazy-pages/src/sys/unix.rs	0% smaller
node/authorship/Cargo.toml	Unsupported file format
node/authorship/build.rs	0% smaller
node/cli/src/cli.rs	0% smaller
node/cli/src/command.rs	0% smaller
pallets/gear-builtin/Cargo.toml	Unsupported file format
pallets/gear/src/benchmarking/mod.rs	0% smaller
pallets/gear/src/benchmarking/tests/syscalls_integrity.rs	0% smaller
pallets/gear/src/schedule.rs	0% smaller
sandbox/host/Cargo.toml	Unsupported file format
sandbox/host/src/sandbox/wasmer_backend.rs	0% smaller
sandbox/host/src/sandbox/wasmtime_backend.rs	0% smaller
sandbox/sandbox/Cargo.toml	Unsupported file format
scripts/src/test.sh	Unsupported file format
utils/calc-stack-height/Cargo.toml	Unsupported file format
utils/crates-io/src/lib.rs	0% smaller
utils/gear-wasmer-cache/Cargo.toml	Unsupported file format
utils/gear-wasmer-cache/src/lib.rs	0% smaller
utils/gear-workspace-hack/Cargo.toml	Unsupported file format
utils/lazy-pages-fuzzer/Cargo.toml	Unsupported file format
utils/lazy-pages-fuzzer/src/lib.rs	0% smaller
utils/wasm-optimizer/Cargo.toml	Unsupported file format

[breathx]

Unstable right now. Will be considered in future

[gemini-code-assist]

Code Review

This pull request migrates the WebAssembly sandbox backend from Wasmer to Wasmtime across the entire workspace, including ethexe, protocol, and vara components. The transition involves implementing a new Wasmtime backend, updating gas metering weights to account for Winch compiler optimizations, and removing Wasmer-specific caching logic. Feedback identifies several critical issues, including compilation errors in Linker::get and Val::ty usage, and potential panics from expect calls in host functions and instantiation that violate repository safety rules. Additionally, a typo shadowing the HostError type was found, and an improvement was suggested to restore store data after function invocation to prevent side effects.