HouseKeeping add updated crvPBTC strategy

[saltyfacu]

HouseKeeping add crvPBTC strategy latest update from this address: 0x123964EbE096A920dae00Fb795FFBfA0c9Ff4675

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

[ghost]

crvPBTC, crvOBTC, crvTBTC and crvsUSD are all the exact same contract initiated with different parameters.

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[saltyfacu]

Repository is superseded by yearn-vaults