Update spec tests (#2690)

* Update wasm-tools crates

* Update Wasm SIMD spec tests

* Invert 'experimental_x64_should_panic' logic

By doing this, it is easier to see which spec tests currently panic. The new tests correspond to recently-added instructions.

* Fix: ignore new spec tests for all backends

crates/fuzzing/Cargo.toml

@@ -13,8 +13,8 @@ arbitrary = { version = "1.0.0", features = ["derive"] }
 env_logger = "0.8.1"
 log = "0.4.8"
 rayon = "1.2.1"
-wasmparser = "0.75"
-wasmprinter = "0.2.23"
+wasmparser = "0.76"
+wasmprinter = "0.2.24"
 wasmtime = { path = "../wasmtime" }
 wasmtime-wast = { path = "../wast" }
 wasm-encoder = "0.4"
@@ -22,7 +22,7 @@ wasm-smith = "0.4.0"
 wasmi = "0.7.0"
 
 [dev-dependencies]
-wat = "1.0.28"
+wat = "1.0.36"
 
 [features]
 experimental_x64 = ["wasmtime/experimental_x64"]