fix: tests misc CI failures

- Add default impl for try_successful_origin in EnsureOriginWithArg trait
  to handle feature unification where pezframe-support/runtime-benchmarks
  is enabled but implementing crate's runtime-benchmarks is not
- Add SKIP_WASM_BUILD=1 to test-node-metrics job to avoid serde_core WASM bug
- Skip vendor workspace crates in check-each-crate.py that can't build standalone

bizinikiwi/pezframe/support/src/traits/dispatch.rs

@@ -177,8 +177,14 @@ pub trait EnsureOriginWithArg<OuterOrigin, Argument> {
 	/// is impossible.
 	///
 	/// ** Should be used for benchmarking only!!! **
+	///
+	/// Default implementation returns `Err(())` to handle feature unification issues where
+	/// pezframe-support/runtime-benchmarks is enabled but the implementing crate's
+	/// runtime-benchmarks feature is not. Implementations should override this.
 	#[cfg(feature = "runtime-benchmarks")]
-	fn try_successful_origin(a: &Argument) -> Result<OuterOrigin, ()>;
+	fn try_successful_origin(_a: &Argument) -> Result<OuterOrigin, ()> {
+		Err(())
+	}
 }
 
 /// Simple macro to explicitly implement [EnsureOriginWithArg] to be used on any type which