[federation][resolvers] Do not generate __resolveReference if not resolvable

[eddeee888]

Description

From Apollo Federation doc: https://www.apollographql.com/docs/federation/federated-types/federated-directives/#resolvable: when there's no resolvable @keys on an object type in a subgraph, we cannot move to the object type in said subgraph.

This PR:

• avoids generating __resolveReference if there's no resolvable @key
• generates __resolveReference for resolvable @key and skip non-resolvable ones
• report whether a type has reference resolver in meta so something like Server Preset can handle it correctly

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

Screenshots/Sandbox (if appropriate/relevant):

Adding links to sandbox or providing screenshots can help us understand more about this PR and take action on it as appropriate

How Has This Been Tested?

• Unit tests for federation and resolvers plugin

[changeset-bot]

🦋 Changeset detected

Latest commit: 9e14ec7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 10 packages

Name	Type
@graphql-codegen/visitor-plugin-common	Minor
@graphql-codegen/typescript-resolvers	Minor
@graphql-codegen/plugin-helpers	Minor
@graphql-codegen/typescript-document-nodes	Patch
@graphql-codegen/gql-tag-operations	Patch
@graphql-codegen/typescript-operations	Patch
@graphql-codegen/typed-document-node	Patch
@graphql-codegen/typescript	Patch
@graphql-codegen/graphql-modules-preset	Patch
@graphql-codegen/client-preset	Patch

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[github-actions]

🚀 Snapshot Release (alpha)

The latest changes of this PR are available as alpha on npm (based on the declared changesets):

Package	Version	Info
@graphql-codegen/visitor-plugin-common	5.3.0-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript-document-nodes	4.0.8-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/gql-tag-operations	4.0.8-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript-operations	4.2.2-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript-resolvers	4.2.0-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/typed-document-node	5.0.8-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/typescript	4.0.8-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/client-preset	4.2.7-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/graphql-modules-preset	4.0.8-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎
@graphql-codegen/plugin-helpers	5.1.0-alpha-20240606121041-9e14ec7dd5cde0aa2beb9e8e9f6bd4ccb65650b9	npm ↗︎ unpkg ↗︎

[github-actions]

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