fix: remove ProgramVersion circular dependency

[johnrees]

While setting up tests I noticed there's a circular dependency which is causing some unexpected behaviour.

Calls to ProgramVersion.V1 will sometimes fail because ProgramVersion === undefined when there are circular dependencies with enums

before

after

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[johnrees]

These red nodes are the files linked to scripts/governance-notifier.ts which are affected by circular imports

and after

I think I will add the borsh fix in this PR too

[johnrees]

nvm, I'll come back to borsh in a separate PR if it's an issue