refactor: remove PullCanisterInfo type

[ericswanson-dfinity]

Description

This is a proof-of-concept, removing the PullCanisterInfo type. The PullBuilder type remains, though its methods are now unreachable.

This is meant as a first step in moving toward an approach where canister properties aren't specific to a particular "type" of canister (though some properties may be mutually exclusive).

How Has This Been Tested?

Refactor covered by e2e.

Checklist:

• [ ] The title of this PR complies with Conventional Commits.
• [ ] I have edited the CHANGELOG accordingly.
• [ ] I have made corresponding changes to the documentation.