Move the fuzz directory into main workspace

This'll help us track dependencies and head off issues like #721

fuzz/Cargo.toml

@@ -16,22 +16,22 @@ wasmtime-fuzzing = { path = "../crates/fuzzing", features = ["env_logger"] }
 wasmtime-jit = { path = "../crates/jit" }
 libfuzzer-sys = { git = "https://github.com/rust-fuzz/libfuzzer-sys.git" }
 
-# Prevent this from interfering with workspaces
-[workspace]
-members = ["."]
-
 [[bin]]
 name = "compile"
 path = "fuzz_targets/compile.rs"
+test = false
 
 [[bin]]
 name = "instantiate"
 path = "fuzz_targets/instantiate.rs"
+test = false
 
 [[bin]]
 name = "instantiate_translated"
 path = "fuzz_targets/instantiate_translated.rs"
+test = false
 
 [[bin]]
 name = "api_calls"
 path = "fuzz_targets/api_calls.rs"
+test = false