fix(query-planner-js): buildComposedSchema doesn't preserve @deprecated usages on input values

[trevor-scheer]

Reported by @sachindshinde - specifically calling printSchema(buildComposedSchema(parse(supergraphSdl))) loses @deprecated usages on input values.

[glasser]

What exactly do you mean by input values? Arguments definitions, input field definitions, or both?

Are we positive the loss is in buildComposedSchema rather than printSchema, or both?

(Note that support of these two features is still unmerged in the graphql-spec (graphql/graphql-spec#805) although I do believe graphql-js already implements them.)

Is this just a matter of porting some changes from graphql-js to our copy/paste?