In-app Gnosis Safe execution

[ilikesymmetry]

What's included in this pr + description

Motivation & Context

Steps to test

Screenshots and/or loom video

Outstanding issues

Relevant docs

[linear[bot]]

WEB-957 In-app gnosis payment execution (single)

Resources: * [Designs](https://www.figma.com/file/dEkMwNyiRBGezorxrW5iP4/S11?node-id=214%3A29947) * [Gnosis Safe contract](https://github.com/safe-global/safe-contracts/blob/main/contracts/GnosisSafe.sol) * [execTransaction function](https://github.com/safe-global/safe-contracts/blob/main/contracts/GnosisSafe.sol#L111) * copy ABI from Etherscan [here](https://etherscan.io/address/0xd9Db270c1B5E3Bd161E8c8503c55cEABeE709552#code) * [Safe transaction API](https://safe-transaction-mainnet.safe.global/) * use `/v1/multisig-transactions/{safe_tx_hash}/confirmations/` to fetch signatures from signers needed to call contract * concat to one `bytes` value by removing `0x` from each individual signature and concatting them in order of increasing address values (using `sortAddressesIncreasing` utility) * [Gnosis Safe version deploy history](https://github.com/safe-global/safe-deployments/tree/main/src/assets)

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Name	Status	Preview	Updated
web	✅ Ready (Inspect)	Visit Preview	Nov 29, 2022 at 2:38AM (UTC)

[mindapivessa]

• Move the "pay" CTA to the right of the modal.
• Change copy at loading to "Executing the transaction. View on Explorer (arrow)" (link the explorer to etherscan).