fix(fuzz): skip reflect err for variadic calls (#921)

Skip pattern for the variadic function type mismatch error
format ("reflect: cannot use X as type Y in Call"). Differs from
the regular function error format that was already covered.

Signed-off-by: Ville Vesilehto <ville@vesilehto.fi>

Author: thevilledev

test/fuzz/fuzz_test.go

@@ -42,6 +42,7 @@ func FuzzExpr(f *testing.F) {
 		regexp.MustCompile(`using interface \{} as type .*`),
 		regexp.MustCompile(`reflect.Value.MapIndex: value of type .* is not assignable to type .*`),
 		regexp.MustCompile(`reflect: Call using .* as type .*`),
+		regexp.MustCompile(`reflect: cannot use .* as type .* in .*`),
 		regexp.MustCompile(`reflect: Call with too few input arguments`),
 		regexp.MustCompile(`invalid number of arguments`),
 		regexp.MustCompile(`reflect: call of reflect.Value.Call on .* Value`),