[BIP-487] Balancer <> Across Add more BAL to LP

PR with Payload

https://github.com/BalancerMaxis/multisig-ops/pull/630

Across supporting the Balancer token has been a huge success. So much so that the Across LP is nearly maxed out. This proposal asks the Balancer treasury to deposit another 40,000 BAL tokens into the Across LP (same size as initial deposit).

Motivation: Balancer has 80k tokens that are stuck on Multichain and not useable for bridging. BAL token is not enabled on any other of the main 3rd party bridges (not canonical) for a meaningful amount of routes. Balancer team is pushing for more cross chain uses of the token and Across is the dominant bridge in being able to provide this service.

Here is a graph of volume share between the canonical bridges (arbitrum, polygon, and base) and Across bridge over the last 100 days. You can see Across continues to gain share and it's currently 52% of the overall market vs canonical bridges!

Here is the current state of the BAL pool on Across, 90% utilized and hence offering 12% to LPs via bridge fees paid. During this period of recent high utilization, the LP has attracted ~8k of BAL tokens from various participants.

Specification:

1. Get HubPool address from https://github.com/across-protocol/contracts-v2/blob/master/deployments/deployments.json
2. Approve HubPool contract to spend the right amount of BAL
3. Call addLiquidity on the HubPool contract https://github.com/across-protocol/contracts-v2/blob/master/contracts/HubPool.sol#L454
4. This will give LP tokens back

Technical Specifications

The Balancer DAO multisig eth:0x10A19e7eE7d7F8a52822f6817de8ea18204F2e4 will interact with the BAL token contract at 0xba100000625a3754423978a60c9317c58a424e3D and call approve with amount 40000000000000000000000. Then, the Balancer DAO multisig eth:0x10A19e7eE7d7F8a52822f6817de8ea18204F2e4 will interact with 0xc186fA914353c44b2E33eBE05f21846F1048bEda, call addLiquidity with l1Token as 0xba100000625a3754423978a60c9317c58a424e3D and l1TokenAmount as 40000000000000000000000