Refactoring signature-request.spec.js to use fixtures

[NiranjanaBinoy]

Fixes: #10806

Explanation:

• Moved the file to test/e2e/tests
• Updated signature-request.spec.js to use fixtures.
• Updated run-all.sh to use the new test file.
• Deleted the old signature-request.spec.js file

[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 [c60a53a]

• builds: chrome, firefox, opera
• bundle viz: background, ui, inpage, contentscript, ui-libs, bg-libs, phishing-detect
• build viz: Build System
• code coverage: Report
• storybook: Storybook
• all artifacts

Page Load Metrics (553 ± 60 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	NaN	NaN	NaN	NaN	NaN
		domContentLoaded	348	733	552	124	60
		load	350	734	553	124	60
		domInteractive	348	733	552	124	60

[Gudahtt]

Looks good! I think we can remove more from the end, but I can approve after that.

I think the last section was intended to verify the signature, but it doesn't actually do that unfortunately.

[metamaskbot]

Builds ready [d591290]

• builds: chrome, firefox, opera
• bundle viz: background, ui, inpage, contentscript, ui-libs, bg-libs, phishing-detect
• build viz: Build System
• code coverage: Report
• storybook: Storybook
• all artifacts

Page Load Metrics (611 ± 43 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	45	71	57	9	4
		domContentLoaded	383	760	610	89	43
		load	385	761	611	89	43
		domInteractive	383	760	610	89	43

[metamaskbot]

Builds ready [33ef58c]

• builds: chrome, firefox, opera
• bundle viz: background, ui, inpage, contentscript, ui-libs, bg-libs, phishing-detect
• build viz: Build System
• code coverage: Report
• storybook: Storybook
• all artifacts

Page Load Metrics (558 ± 62 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	45	80	60	8	4
		domContentLoaded	373	876	556	130	62
		load	375	877	558	129	62
		domInteractive	372	875	556	130	62

[Gudahtt]

LGTM!