feat(sdk): with _opts methods

Now all opt values enter into a _opts function instead of the original.
This avoids a lot of verbosity for both None in the case opts are
unwanted, and Some() if they actually are.

They are used like so:

```rust
client.container().from("...");
client.container_opts(Some(ContainerOpts{ ... }))
```

Some from opts will be removed in a future commit/pr

crates/dagger-sdk/tests/mod.rs

@@ -4,10 +4,10 @@ use dagger_sdk::{connect, ContainerExecOptsBuilder};
 fn test_example_container() {
     let client = connect().unwrap();
 
-    let alpine = client.container(None).from("alpine:3.16.2");
+    let alpine = client.container().from("alpine:3.16.2");
 
     let out = alpine
-        .exec(Some(
+        .exec_opts(Some(
             ContainerExecOptsBuilder::default()
                 .args(vec!["cat", "/etc/alpine-release"])
                 .build()