RUST-148 Fix Windows e2e tests failing

[jerome-chetelat-sonarsource]

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FV: https://github.com/SonarSource/sonar-rust/actions/runs/27420843292/job/81047002643?pr=242

Summary by Gitar

• CI/CD Configuration:
  • Export BUILD_NUMBER from the build job to enable downstream cache management.
  • Inject BUILD_NUMBER environment variable into E2E test jobs for cache invalidation.

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[hashicorp-vault-sonar-prod]

RUST-148

[sonarqube-next]

Quality Gate passed for 'sonar-rust'

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
0 Dependency risks
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarQube

[gitar-bot]

Code Review ✅ Approved

Adds BUILD_NUMBER to build and E2E test jobs to facilitate cache management. No issues found.

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