[BIP-228] Enable bb-t-MATIC Gauge [Polygon]

PR with payload

Summary: The Tetu Protocol has been actively building within the Balancer ecosystem, with tetuBAL serving as its primary Balancer-focused product. Tetu wants to leverage boosted pool functionality by introducing the bb-t-matic composable pool which consists of 2 liner pools (bb-t-WMATIC , bb-t-stMATIC)

The underlying tokens are WMATIC and stMatic. Those tokens will be partially invested in the TETU4626 vaults.

References/Useful links:

• Website - https://tetu.io/ 2
• Documentation - Introduction - Tetu
• Github Page - Tetu · GitHub
• Communities - Tetu

Protocol Description:

Tetu is an asset management protocol that implements automated yield farming strategy for users.

Motivation:

The implementation of linear and boosted pools is gradually enhancing Balancer’s capacity to boost capital efficiency throughout the protocol. The robust boosted pool aligns with Balancer’s objective to offer a secure platform for LPs to access external yield sources while simultaneously ensuring efficient liquidity for swapping. This approach benefits both LPs and the DAO, generating yield

Specifications:

1. Governance: Multi Sig - Tetu
2. Oracles: No
3. Audits: docs.tetu.io
4. Centralization vectors: n/a
5. Market History: Tetu token can be volatile in the certain market conditions.

Composable Pool: 0xF22a66046B5307842F21B311ECB4C462c24C0635

Gauge: 0x508601c0ea0197afB08AA4cbA698c1551f5DA53f