[e2e] Fix Dapp interactions flaky test on chrome

[seaona]

Explanation

Dapp interactions testcase is flaky and failing more often recently on chrome, due to trying to switch to MM Notification popup before being displayed.

This PR fixes it by waiting until we have 4 windows on the getAllWindowsHandles.

Screenshots/Screencaps

Before

See failures, as only 3 windows were present at that time (added logs for clarity)

After

See successful test, now waits for 4 windows.

Manual Testing Steps

1. Build test yarn build:test
2. Run the flaky test on chrome yarn test:e2e:single test/e2e/tests/dapp-interactions.spec.js --browser=chrome

Pre-Merge Checklist

• PR template is filled out
• IF this PR fixes a bug, a test that would have caught the bug has been added
• PR is linked to the appropriate GitHub issue
• PR has been added to the appropriate release Milestone

+ If there are functional changes:

• Manual testing complete & passed
• "Extension QA Board" label has been applied

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[metamaskbot]

Builds ready [b876940]

• builds: chrome, firefox, opera
• builds (beta): chrome, firefox, opera
• builds (flask): chrome, firefox, opera
• build viz: Build System
• mv3: Background Module Init Stats
• mv3: UI Init Stats
• mv3: Module Load Stats
• mv3: Bundle Size Stats
• mv2: E2e Actions Stats
• code coverage: Report
• storybook: Storybook
• typescript migration: Dashboard
• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • contentscript: contentscript
  • disable-console: disable-console
  • inpage: inpage
  • policy-load: policy-load
  • sentry-install: sentry-install
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (2223 ± 112 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	84	2226	218	461	221
		domContentLoaded	1766	2587	2196	217	104
		load	1766	2708	2223	233	112
		domInteractive	1766	2587	2196	217	104