deployment: extract common env to hybrid/common/common.yaml

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• deployment: make gcpPodMonitoring enable configurable #14240
• deployment: fix storage reader port #14229
• deployment: add service ports to hybrid common service overlays #14215
• deployment: extract common env to hybrid/common/common.yaml #14249 👈 (View in Graphite)
• deployment: extract core common config #14248
• deployment: extract mempool common config #14247
• deployment: extract gateway common config #14246
• deployment: extract l1 common config #14245
• deployment: extract committer common config #14244
• deployment: extract sierra-compiler common config #14243
• deployment: support include directive in common yaml loader #14242
• deployment: add gcp pod monitoring to hybrid environment overlays #14192 : 1 other dependent PR (#14196 )
• deployment: add liveness probe to hybrid environment overlays #14191
• deployment: add readiness probe to hybrid environment overlays #14190
• deployment: add startup probe to hybrid environment overlays #14188
• deployment: add monitoring endpoint port to hybrid environment overlays #14187
• main-v0.14.3

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PR Summary

Low Risk
Config-only refactor with no application code changes; risk is limited to overlay merge/include behavior staying equivalent across environments.

Overview
Introduces a shared hybrid overlay at configs/overlays/hybrid/common/common.yaml and wires mainnet, sepolia-alpha, and sepolia-integration common.yaml files to pull it in via include.

The duplicated blocks removed from each network overlay are the image defaults (repository/pull policy), shared sequencerConfig fee tokens and versioned-constants overrides, monitoring service port 8082, health probes, GCP pod monitoring, and RUST_ env vars. Each environment file now only keeps network-specific pieces such as image tag, chain_id, whitelist, and feeder/recorder URLs.

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