[BIP-699] Enable-wstETH-GYD-Gauge [Arbitrum]

[Zen-Maxi]

Proposal: https://forum.balancer.fi/t/bip-xxx-enable-a-wsteth-gyd-gauge-arbitrum/5986

Rate provider review of GYD: balancer/code-review#153

[github-actions]

FILENAME: BIPs/2024-W39/[BIP-699] Enable wstETH-GYD Gauge [Arbitrum].json
COMMIT: 3ed0bce7bd7376b790bb0985bfe5538d8b87499d

Validator	Result
validate_contains_msig	✅
validate_msig_in_address_book	✅
validate_chain_specified	✅
validate_file_has_bip	✅
validate_path_has_weekly_dir	✅

[github-actions]

FILENAME: BIPs/2024-W39/[BIP-699] Enable wstETH-GYD Gauge [Arbitrum].json
MULTISIG: multisigs/lm (mainnet:0xc38c5f97B34E175FFd35407fc91a937300E33860)
COMMIT: 3ed0bce7bd7376b790bb0985bfe5538d8b87499d
CHAIN(S): arbitrum
TENDERLY: 🟩 SUCCESS

Gauge Validator	Result
validate_preferential_gauge	✅
validate_rate_providers_safety	✅ ✅

+-----------------------+---------------------------------------------------------------------+------------------+--------------------------------------------------+----------------------------------------------------+--------------------------------------------+----------------+---------+----------+
| function              | pool_id_and_address                                                 | symbol_and_info  | gauge_address_and_info                           | tokens                                             | rate_providers                             | review_summary |   bip   | tx_index |
+-----------------------+---------------------------------------------------------------------+------------------+--------------------------------------------------+----------------------------------------------------+--------------------------------------------+----------------+---------+----------+
| GaugeAdderV4/addGauge | 0x6ce1d1e46548ef657f8d7ebddfc4beadb04f72f30002000000000000000005a1  | ECLP-wstETH-GYD  | root: 0x9E965252d1b294aF358a232933A65Bd30645c34C | 0x5979D7b546E38E414F7E9822514be443A4800529: wstETH | 0xf7c5c26B574063e7b098ed74fAd6779e65E3F836 |      safe      | BIP-699 |    0     |
|                       | pool_address: 0x6ce1D1e46548ef657f8D7Ebddfc4BEaDB04F72f3            | fee: 0.3         | side: 0x654a17A779B82BA7739cD3Adb2052e039c4366C5 | 0xCA5d8F8a8d49439357d3CF46Ca2e720702F132b8: GYD    | 0x72F6Da3b4bd0Ab7028F52339Ee3B1f94fffe2dD0 |      safe      |         |          |
|                       |                                                                     | a-factor: N/A    | style: L0 sidechain                              |                                                    |                                            |                |         |          |
|                       |                                                                     |                  | cap: 100.0%                                      |                                                    |                                            |                |         |          |
|                       |                                                                     |                  | preferential: True                               |                                                    |                                            |                |         |          |
+-----------------------+---------------------------------------------------------------------+------------------+--------------------------------------------------+----------------------------------------------------+--------------------------------------------+----------------+---------+----------+