[Round 2] Upgrade GKE clusters to 1.34

### Context

See [#7397](https://github.com/2i2c-org/infrastructure/issues/7397)

### What we need to do

Upgrade K8s version to 1.34 on the following clusters


### Definition of Done

- [ ] 2i2c-uk
- [ ] awi-ciroh
- [ ] hhmi
- [ ] leap 
