[rfq] Do not approve to both synapse_cctp and token messenger

To resolve the issue of approving to both synapse_cctp and token messenger, follow these steps:

Update approveToken function in /packages/synapse-interface/utils/approveToken.tsx:
- Add a check to ensure address and tokenAddress are not zero addresses before calling approveErc20Token.
```
if (address === zeroAddress || tokenAddress === zeroAddress) {
throw new Error('Cannot approve to zero address');
}
```
Update approveErc20Token function in /packages/synapse-interface/actions/approveErc20Token.ts:
- Add a check to ensure spender and tokenAddress are not zero addresses before proceeding with the approval.
```
if (spender === zeroAddress || tokenAddress === zeroAddress) {
throw new Error('Cannot approve to zero address');
}
```
Update approve function in /packages/synapse-interface/utils/actions/approveAndDeposit.tsx and /packages/synapse-interface/utils/actions/approveAndWithdraw.tsx:
- Add a check to ensure poolAddress and tokenToApprove are not zero addresses before calling approveToken.
```
if (poolAddress === zeroAddress || tokenToApprove === zeroAddress) {
throw new Error('Cannot approve to zero address');
}
```

These changes will prevent approvals to zero addresses and avoid reverts.

synapsecns / sanguine