Update Cypress tests to assert delete in ServingRuntimeList

[ashley-o0o]

Closes: RHOAIENG-3838

Description

This PR aims to update existing cypress tests on ServingRuntimeList.cy.ts to test the delete functionality for model servers

How Has This Been Tested?

npm run test

Test Impact

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Commits have been squashed into descriptive, self-contained units of work (e.g. 'WIP' and 'Implements feedback' style messages have been removed)
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change (find relevant UX in the SMEs section).

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[pnaik1]

@ashley-o0o Can you please review the checklist in the PR's description?

[pnaik1]

/lgtm

[christianvogt]

/retest

[christianvogt]

/lgtm
/approve

[openshift-ci]

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