Migrating React Relay from v16 to v17

Relay 17 adds schema validation and editor enhancements.

Key changes

The compiler now validates your schema and client extensions. This can be disabled via disable_schema_validation.
Edge type names in directives like @appendNode and @prependNode are validated.
A new efficient hooks implementation reduces memory usage.
Significant improvements to the VSCode extension, including rename refactoring and inlay hints.

By default the compiler validates server schema and client extensions. Example relay.config.json feature flag:

{
  "featureFlags": { "disable_schema_validation": false }
}

Disable validation if necessary:

{
  "featureFlags": { "disable_schema_validation": true }
}

Upgrade react-relay and relay-compiler to ^17.0.0.
Run the compiler and fix any schema validation errors or opt out with:
```
{
  "featureFlags": { "disable_schema_validation": true }
}
```
Ensure edge type names in connection directives are correct or disable with disable_edge_type_name_validation_on_declerative_connection_directives.
Verify the new hooks work with your project and update tests as needed.