Add EE E2E Test Coverage Support and Fix Edit Stage Instance Bug

[Pezmc]

Description

This PR has two halves:

• Fixing the bug when changing a stages instance
• Adding support for EE E2E test coverage to flowforge

Cypress commands are now as follows:

  cy:web-server
    npm-run-all --parallel cy:web-server:os cy:web-server:ee
  cy:web-server:os
    node ./test/e2e/frontend/test_environment_os
  cy:web-server:ee
    node ./test/e2e/frontend/test_environment_ee
  cy:run
    npm-run-all --parallel cy:run:os cy:run:ee
  cy:run:os
    cypress run --config-file ./config/cypress-os.config.js
  cy:run:ee
    cypress run --config-file ./config/cypress-ee.config.js
  cy:open:os
    cypress open --config-file ./config/cypress-os.config.js
  cy:open:ee
    cypress open --config-file ./config/cypress-ee.config.js

A developer would run cy:web-server(:os/:ee) and then cy:open:os or cy:open:ee to work on the tests.

To run the tests cy:web-server(:os/:ee) and then cy:run(:ee/:os)

The EE E2E tests live in test/e2e/frontend/cypress/tests-ee

Related Issue(s)

Fixes #2287

Checklist

• I have read the contribution guidelines
• Suitable unit/system level tests have been added and they pass
• Documentation has been updated
  • Upgrade instructions
  • Configuration details
  • Concepts
• Changes flowforge.yml?
  • Issue/PR raised on flowforge/helm to update ConfigMap Template
  • Issue/PR raised on flowforge/CloudProject to update values for Staging/Production

Labels

• Backport needed? -> add the backport label
• Includes a DB migration? -> add the area:migration label

[Pezmc]

This PR now has test coverage. Importantly this is EE test coverage.

Going forward, EE E2E test coverage lives in: test/e2e/frontend/cypress/tests-ee

You can run EE E2E test coverage using: npm run cy:web-server:ee and npm run cy:run:ee

OS is also now scoped to: npm run cy:web-server:os and npm run cy:run:os

cy:run, cy:web-server will run both EE and OS in parallel.

[joepavitt]

worth updating PR title just to reflect the scope of work done here now?