deployment: add proof archive bucket name to env gateway overlays

[nimrod-starkware]

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[reviewable-StarkWare]

This change is 

[nimrod-starkware]

• deployment: test envs deployment #14284
• deployment: verify ports are unique #14267
• deployment: add proof archive bucket name to env gateway overlays #14289 👈 (View in Graphite)
• deployment: add monitoring endpoint port to hybrid common overlay #14266
• deployment: add http server port to hybrid common service overlay #14262
• deployment: add mempool p2p port to hybrid common service overlay #14261
• main-v0.14.3

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[cursor]

PR Summary

Medium Risk
Misconfigured bucket names could send proof archives to the wrong environment’s storage; impact is limited to deployment config, not application logic.

Overview
Sets gateway_config.static_config.proof_archive_writer_config.bucket_name on the hybrid gateway service overlays for mainnet, sepolia-alpha, and sepolia-integration, so each environment’s gateway writes proof archives to its own bucket (starkware-starknet-mainnet, starkware-starknet-alpha, starkware-starknet-integration). The shared hybrid gateway config still does not define this field; only these env-specific overlays are extended.

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