(v7) make functions and packages public

[Reecepbcups]

Since this is a framework for testing, we should attempt to make all functions (within reason) public.

Versions

• [ ] v7

• [x] v8 (main)

• ex: PrivValFileContent and OverwritePrivValFile in v7.

this may also be useful with the internal/ repo. For example, the local-interchain lense clone could use docker internal functions, but it can not be accessed outside.

[chatton]

Was just going to create an issue to make some of the functions in the internal package public, specifically the FileRetriever type and associated functions, fetching files (such as private keys) from validator nodes can be extremely useful in some more complex test scenarios.

[Reecepbcups]

Compelted