Refresh autopilot LS + forward

[asalzmann]

Closes: #771

Context and purpose of the change

Add autopilot liquid stake + forward support. This allows autopilot liquid stakers to specify a receiving address and IBC channel, where stTokens will be forwarded after being liquid staked.

Open questions

• What should the IBC transfer timeout be?
• Should we use a hash for the sender address (similar to PFM) to avoid the security vulnerability discovered by SCV?

Next steps

• Remove StrideAddress (it's unused)
• Implement redeem functionality

Brief Changelog

• Add integration test
• Update autopilot keeper to have access to the transfer keeper
• Add IbcReceiver and TransferChannel to StakeibcPacketMetadata
• Add IBCTransferStAsset function, called at the end of RunLiquidStake

Test plan

• Add integration test
  • TODO: add additional test for missing IbcReceiver and TransferChannel fields
• Manually test LS + forward to a different network

[sampocs]

very clean! looks good so far, pending the sender change!

[shellvish]

Looks great to me, thanks for doing this! Fwiw, I think this is also working on testnet now, but we can also add more connections there and test edge cases (e.g. sending to a new network)

[sampocs]

@asalzmann fyi, unit tests for this are in #1041

[asalzmann]

Next steps for this PR

• Merge in other PRs that depend on this PR
• Do manual test in description
• (maybe - unsure if needed) add another integration test

[sampocs]

(for the record)...

Merge in other PRs that depend on this PR

We decided to merge this first

Do manual test in description

Done and resolved comment

(maybe - unsure if needed) add another integration test

We decided it wasn't necessary