[5.x] Support query scopes in GraphQL

[ryanmitchell]

Building on the PR I opened for the REST API (#10893) this PR adds QueryScope support to the EntriesQuery in GraphQL.

This allows you to write queries such as:

{
entries (query_scope: { test_scope: { my_param: "a" } }) {
current_pagedata {
idtitle
}
}
}

And your test_scope query scope will be applied to the results.

I've only applied this to the EntriesQuery for now but am happy to apply it out to others if you feel it appropriate.

[jasonvarga]

I've only applied this to the EntriesQuery for now but am happy to apply it out to others if you feel it appropriate.

I've merged this as-is. If you want to roll it out, go for it, or we can wait until there's demand.

[ryanmitchell]

We only wanted it for entries so I’ll let others add it if they need it.

Thanks for the merges!