Update @tag definitions

[trevor-scheer]

No description provided.

[EverlastingBugstopper]

cc @prasek these are the changes to make composition succeed

[EverlastingBugstopper]

lets hold off merging this until we are ready to release rover (likely tomorrow), then we can have a smaller window where CI is failing due to old builds of rover

edit:

confirmation that this does work with the avery/update-harmonizer branch on the rover repo:

$ cargo xtask integration-test --branch trevor/update-tag-defs
    Finished dev [unoptimized + debuginfo] target(s) in 0.08s
     Running `target/debug/xtask integration-test --branch trevor/update-tag-defs`
info: running `cargo build --target x86_64-unknown-linux-gnu` in `/home/avery/work/rover`
info: successfully compiled to `/home/avery/work/rover/target/x86_64-unknown-linux-gnu/debug/rover`
info: running `git clone https://github.com/apollographql/supergraph-demo --branch trevor/update-tag-defs` in `/tmp/.tmpbdZhRE`
info: running `make ci` in `/tmp/.tmpbdZhRE/supergraph-demo`
info: successfully ran supergraph-demo with a local binary.
Success!

[prasek]

@trevor-scheer if apollographql/federation#1022 will allow the existing @tag directive declarations to work then perhaps we can cut a new harmonizer with that and use that for the new rover drop? /cc @EverlastingBugstopper @abernix

[EverlastingBugstopper]

This PR can be closed