feat(query-planner): Include operationKind and operationName in FetchNodes (backport)

[trevor-scheer]

Backport of:
#1427
#1550 + #1568

This maintains parity in the query plan format with v2 by generating operation names for subgraph fetches. This also brings in the addition of operationKind out of convenience / maintaining parity since the changes are so closely related.

cc @chrskrchr who I know was interested in this addition for v0.x and @lennyburdette as the implementor of the name generation

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[pcmanus]

Regarding operation names, this needs to include the changes from 82d810f. But looks good to me otherwise.

[trevor-scheer]

Thanks @pcmanus, good catch (I had missed those tests altogether during my cherry-pick). Needs an actual approval then I'll land!

[pcmanus]

Lgtm. But I'd make sure we don't forget a changelog entry that mentions that queries sent to subgraph can now be named since it's a small but visible-ish change (I could see a user have tests that needs update due to this).