Fix e2e test concurrency group on PR builds

[WVerlaek]

Description

Ensure e2e tests when enabled on PRs don't run in parallel against the same preview env

Summary generated by Copilot

🤖 Generated by Copilot at 32a202c

Use preview name for concurrency group of integration-test job in .github/workflows/build.yml. This prevents integration tests from interfering with each other when testing the same preview environment.

Related Issue(s)

Fixes #

How to test

Documentation

Preview status

gitpod:summary

Build Options

Build

• /werft with-werft
  Run the build with werft instead of GHA
• leeway-no-cache
• /werft no-test
  Run Leeway with --dont-test

Publish

• /werft publish-to-npm
• /werft publish-to-jb-marketplace

Installer

• analytics=segment
• with-dedicated-emulation
• workspace-feature-flags
  Add desired feature flags to the end of the line above, space separated

Preview Environment / Integration Tests

• /werft with-local-preview
  If enabled this will build install/preview
• /werft with-preview
• /werft with-large-vm
• /werft with-gce-vm
  If enabled this will create the environment on GCE infra
• with-integration-tests=all
  Valid options are all, workspace, webapp, ide, jetbrains, vscode, ssh. If enabled, with-preview and with-large-vm will be enabled.
• with-monitoring

/hold

[WVerlaek]

/unhold