HouseKeeping add crvTBTC updated strategy

[saltyfacu]

HouseKeeping add crvTBTC strategy latest update from this address: 0x07FB4756f67bD46B748b16119E802F1f880fb2CC

Should follow similar housekeeping PRs including:

• Refactoring interfaces
• Update calls in code to use interfaces
• CI should be green before merging

Example PRs to follow https://github.com/iearn-finance/yearn-protocol/pull/89/files

[saltyfacu]

Closing in favor of #105