Passing a foreign resource argument should work, or error gracefully

[iwahbe]

What happened?

I tried to create the schema for the random-login provider with this patch:

 examples/random-login/main.go | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/examples/random-login/main.go b/examples/random-login/main.go
index b3b0ba8..7e406fe 100644
--- a/examples/random-login/main.go
+++ b/examples/random-login/main.go
@@ -41,7 +41,8 @@ func provider() p.Provider {
 // like this structure is only implementable in typescript, but that will need to change.
 type MoreRandomPassword struct{}
 type MoreRandomPasswordArgs struct {
-	Length *random.RandomInteger `pulumi:"length" provider:"[email protected]:index/randomInteger:RandomInteger"`
+	Length       *random.RandomInteger      `pulumi:"length" provider:"[email protected]:index/randomInteger:RandomInteger"`
+	PasswordArgs *random.RandomPasswordArgs `pulumi:"pArgs,optional"`
 }
 
 type MoreRandomPasswordState struct {
@@ -59,9 +60,11 @@ func (r *MoreRandomPassword) Construct(ctx *pulumi.Context, name, typ string, ar
 		return nil, err
 	}
 
-	pArgs := &random.RandomPasswordArgs{
-		Length: args.Length.Result,
+	pArgs := args.PasswordArgs
+	if pArgs == nil {
+		pArgs = new(random.RandomPasswordArgs)
 	}
+	pArgs.Length = args.Length.Result
 
 	pctx := infer.CtxFromPulumiContext(ctx)
 	config := infer.GetConfig[Config](pctx)

When I called GetSchema on the provider, I got:

--- FAIL: TestSchema (0.00s)
    main_test.go:137: 
                Error Trace:    /Users/ianwahbe/go/src/github.com/pulumi/pulumi-go-provider/examples/random-login/main_test.go:137
                Error:          Received unexpected error:
                                1 error occurred:
                                        * failed to get schema for 'random-login:index:MoreRandomPassword': 1 error occurred:
                                        * could not serialize input type main.MoreRandomPasswordArgs: invalid type 'random.RandomPasswordArgs' on 'main.MoreRandomPasswordArgs.PasswordArgs': RandomPasswordArgs is an input type, but does not have a ToRandomPasswordArgsOutput method

Expected Behavior

I expect this type to be registered into the schema of random-login. I want this type to be injected into the schema instead of referenced because *Args types are not in the pulumi schema.

Steps to reproduce

See example from commit 6034a2c.

Output of pulumi about

NA

Additional context

No response

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