Support deprecated input object fields in introspection query

[caruspi]

Environment

• Elixir version (elixir -v): 1.14.2-otp-25
• Absinthe version (mix deps | grep absinthe): 1.7.1
• Client Framework and version (Relay, Apollo, etc): Apollo v3.7.5

Expected behavior

When making an introspection query to get data about fields, I'd like to query for deprecated fields on input objects as defined in the graphql-spec

Actual behavior

With this PR Apollo devs added (includeDeprecated: true) as a param to inputFields in the fragment portion of the GraphQL query to download a schema.
This param is not currently supported by Absinthe and the Gradle plugin has stopped working starting from this Apollo version (3.7.5).

Also Close #1113