Upgrade async-graphql deps

[samuel-rufi]

Description of change

Upgrade async-graphql deps

Links to any relevant issues

Aims to fix #4121

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How the change has been tested

cd crates/iota-graphql-e2e-tests
cargo nextest run --features pg_integration

cd crates/iota-graphql-rpc
cargo nextest run -p iota-graphql-rpc --features pg_integration --no-fail-fast --test-threads 1

Change checklist

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked that new and existing unit tests pass locally with my changes

[kodemartin]

@samuel-rufi you can simplify the impl Loader blocks by simply removing the #[async_trait::async_trait].

See this suggestion in the respective discussion after the breaking change with the Loader trait refactoring.

clippy also raises the manual async lint, at least locally.