ci: add govulncheck audit action

[giortzisg]

Description

Adds govulncheck as a dependency audit ci action

Issues

• resolves: ci: add vulnerability check #1322
• resolves: GO-147

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Reminders

• Add GH Issue ID & Linear ID
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[linear-code]

GO-147

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

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New Features ✨

• PushScope shorthand now returns the new scope reference by DoctorJohn in #1335

Bug Fixes 🐛

• Isolate event processor across clones by giortzisg in #1337

Internal Changes 🔧

• Add govulncheck dependency audit action by giortzisg in #1342

• Move limited buffer under utils by giortzisg in #1338

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