chore: Add e2e test case to display alert if there are pending confirmations when adding network

[jpuri]

Description

Add e2e test case to display alert if there are pending confirmations when adding network

Related issues

Fixes: https://github.com/MetaMask/MetaMask-planning/issues/4370

Manual testing steps

NA

Screenshots/Recordings

NA

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Extension Coding Standards.
• I've completed the PR template to the best of my ability
• I’ve included tests if applicable
• I’ve documented my code using JSDoc format if applicable
• I’ve applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

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[digiwand]

Suggested change

	// user decies to confirm adding network
	// user confirms add network confirmation

[digiwand]

lgtm!

left one comment to fix a minor typo