Adds more control over how you can disable GraphQL queries / mutations
for collections and globals.
For example, you might want to disable all GraphQL queries and mutations
for a given collection, but you still have relationship fields that
relate to that collection, therefore depend on the types being
generated.
Now, instead of passing `graphQL: false` (which completely disables
everything, including types, which would break relationship fields) you
can now specify `graphQL.disableQueries: true` and
`graphQL.disableMutations: true`to keep the types, but disable just the
queries / mutations.
Closes#9893
7a59e7da46