Use service name in e2e

[AlistairGempf]

Resolves #NUMBER

Overall change:
Use service name (eg serbian) in e2e rather than test service (eg serbianCyr)

Code changes:

• Destructure test config object to give the service name.

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• I have assigned myself to this PR and the corresponding issues
• I have added labels to this PR for the relevant pod(s) affected by these changes
• I have assigned this PR to the Simorgh project

Testing:

• Automated (jest and/or cypress) tests added (for new features) or updated (for existing features)
• If necessary, I have run the local E2E non-smoke tests relevant to my changes (CYPRESS_APP_ENV=local CYPRESS_SMOKE=false npm run test:e2e:interactive)
• This PR requires manual testing

[AlistairGempf]

All the Jenkins failures are e2es failing because CypressError: Timed out retrying: Expected to find element: 'a[class^="SkipLink"]', but never found it. This is being fixed separately in #4948.