graphql: Return isDeprecated: false for __InputValue in introspection… #11527

Job	Run time
Build in release mode	5m 44s
Run integration tests	4m 14s
Run unit tests	3m 51s
Check rustfmt style	20s
Subgraph Runner integration tests	2m 58s
Clippy linting	1m 50s
	18m 57s

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