BIP-492: Enable weETH/WETH Gauge [Ethereum]

[Xeonus]

• Enable weETH/ETH gauge on Mainnet
• Tenderly-sim: https://dashboard.tenderly.co/public/safe/safe-apps/simulator/a7a1f4c2-f0bb-4185-b7d7-f2b8bb562dd1
• Rate provider review: Ether.fi weETH Balancer Integration threerocks-defi/code-review#28

[github-actions]

BIP validation results for file BIPs/2023-W47/BIP-492.json:
Commit: bd2a13c20bbe23d5c178919b022f4347b1ecd48b

+-------------------------------+--------+
|           Validator           | Result |
+-------------------------------+--------+
|     validate_contains_msig    |   OK   |
| validate_msig_in_address_book |   OK   |
|    validate_chain_specified   |   OK   |
|     validate_file_has_bip     |   OK   |
|  validate_path_has_weekly_dir |   OK   |
+-------------------------------+--------+

[github-actions]

File name: BIPs/2023-W47/BIP-492.json
COMMIT: bd2a13c20bbe23d5c178919b022f4347b1ecd48b
CHAIN(S): mainnet

+-----------------------+---------------------------------------------------------------------+--------------------------+--------------------------------------------+---------------------------------------------------------------+-------------------------------------------------+---------+------------+
| function              | pool_id_and_address                                                 | symbol_and_info          | gauge_address_and_info                     | tokens                                                        | rate_providers                                  | bip     |   tx_index |
+=======================+=====================================================================+==========================+============================================+===============================================================+=================================================+=========+============+
| GaugeAdderV4/addGauge | 0xb9debddf1d894c79d2b2d09f819ff9b856fca55200000000000000000000062a  | weETH-WETH-BPT           | 0x5D7C0521DB5a6F37aD839d0eEfbaF8205389adD8 | "weETH-WETH-BPT(0xb9dEbDDF1d894c79D2B2d09f819FF9B856FCa552)", | "0x0000000000000000000000000000000000000000",   | BIP-492 |          0 |
|                       | pool_address: 0xb9dEbDDF1d894c79D2B2d09f819FF9B856FCa552            | fee: 0.04, a-factor: 600 |  Style: mainnet, cap: 100.0%               |   "WETH(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2)",         |   "0x0000000000000000000000000000000000000000", |         |            |
|                       |                                                                     |                          |                                            |   "weETH(0xCd5fE23C85820F7B72D0926FC9b05b43E359b7ee)"         |   "0xCd5fE23C85820F7B72D0926FC9b05b43E359b7ee"  |         |            |
+-----------------------+---------------------------------------------------------------------+--------------------------+--------------------------------------------+---------------------------------------------------------------+-------------------------------------------------+---------+------------+