Enable build scans for all jobs on CI and nightly flows

[landomen]

Task/Issue URL: https://app.asana.com/1/137249556945/project/488551667048375/task/1213360779751566?focus=true

Description

Adds Develocity build scan support to the CI jobs that we missed originally.

Steps to test this PR

No QA needed

UI changes

No UI changes

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Note

Low Risk
Workflow-only change that adds an env var from secrets; risk is limited to CI behavior and secret availability/misconfiguration.

Overview
Enables Develocity build scan support across CI and nightly GitHub Actions by exporting DEVELOCITY_ACCESS_KEY from secrets into the code_formatting, unit_tests, and lint jobs.

This makes those Gradle tasks run with the same build-scan credentials as the other workflows/jobs, without changing any build logic or tasks executed.

^{Written by Cursor Bugbot for commit 9068256. This will update automatically on new commits. Configure here.}

[landomen]

• Enable build scans for all jobs on CI and nightly flows #7778 👈 (View in Graphite)
• develop

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