deployment: add gcp pod monitoring to hybrid environment overlays

[nimrod-starkware]

Cross-repo PR: https://github.com/starkware-industries/sequencer-devops/pull/719

Cross-repo PR: https://github.com/starkware-industries/sequencer-devops/pull/719

[reviewable-StarkWare]

This change is 

[nimrod-starkware]

• deployment: add gcp pod monitoring to hybrid environment overlays #14192 : 2 dependent PRs (#14196 , #14242 ) 👈 (View in Graphite)
• 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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[cursor]

PR Summary

Low Risk
Observability-only Helm overlay changes; no application logic, auth, or runtime behavior changes beyond enabling metrics scraping.

Overview
Enables GCP PodMonitoring in the shared hybrid overlay configs for mainnet, sepolia-alpha, and sepolia-integration, turning on metrics collection that the chart already supports but leaves off by default.

Each overlay now sets gcpPodMonitoring.enabled: true with a single scrape endpoint on port 8082 at /monitoring/metrics every 10s, aligned with the existing monitoring service port and probe paths in those files.

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[cursor]

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[dorimedini-starkware]

@dorimedini-starkware reviewed 3 files and all commit messages, and made 1 comment.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on idan-starkware, matanl-starkware, and nimrod-starkware).

[dorimedini-starkware]

@dorimedini-starkware reviewed 3 files and all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on idan-starkware, matanl-starkware, and nimrod-starkware).

[nimrod-starkware]

@nimrod-starkware made 1 comment.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on dorimedini-starkware, idan-starkware, and matanl-starkware).

[dorimedini-starkware]

@dorimedini-starkware resolved 1 discussion.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on idan-starkware and matanl-starkware).

[graphite-app]

Merge activity

• May 28, 1:03 PM UTC: Graphite rebased this pull request, because this pull request is set to merge when ready.