refactor(ops): op2 support for generics (#19636)

Implementation of generics for `#[op2]`, along with some refactoring to
improve the ergonomics of ops with generics parameters:

- The ops have generics on the struct rather than the associated
methods, which allows us to trait-ify ops (impossible when they are on
the methods)
- The decl() method can become a trait-associated const field which
unlocks future optimizations

Callers of ops need to switch from:
`op_net_connect_tcp::call::<TestPermission>(conn_state, ip_addr)` to
`op_net_connect_tcp::<TestPermission>::call(conn_state, ip_addr)`.

1 files changed, 1 insertions, 1 deletions

diff --git a/ext/net/ops.rs b/ext/net/ops.rs
index 921b9ea5b..a43e5e999 100644
--- a/ext/net/ops.rs
+++ b/ext/net/ops.rs
@@ -1047,7 +1047,7 @@ mod tests {
     };
 
     let mut connect_fut =
-      op_net_connect_tcp::call::<TestPermission>(conn_state, ip_addr)
+      op_net_connect_tcp::<TestPermission>::call(conn_state, ip_addr)
         .boxed_local();
     let mut rid = None;