refactor: remove unused end param in ethereum-chain-util helpers

[jiexi]

Description

Removes unused end param in the ethereum-chain-util helpers

• validateChainId
• validateAddEthereumChainParams
• validateSwitchEthereumChainParams

Extending E2E timeout to get past "no timings found" error:

flags = { "circleci": { "timeoutMinutes": 30 } }

Related issues

See: #27847 (comment)

Manual testing steps

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[github-actions]

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[adonesky1]

LGTM

[Gudahtt]

LGTM!

[metamaskbot]

Builds ready [1c7ec8c]

• builds: chrome, firefox
• builds (flask): chrome, firefox
• builds (MMI): chrome
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• build viz: Build System
• mv3: Bundle Size Stats
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• storybook: Storybook
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• all artifacts
• bundle viz:

  • background: 0, 1, 2, 3, 4, 5, 6, 7
  • common: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
  • ui: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
  • content-script: 0
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Page Load Metrics (1720 ± 97 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	230	2400	1656	380	183
		domContentLoaded	1452	2350	1692	194	93
		load	1470	2405	1720	202	97
		domInteractive	24	138	43	28	14
		backgroundConnect	7	78	33	19	9
		firstReactRender	16	91	36	24	12
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		initialActions	0	44	2	10	5
		loadScripts	1056	1832	1256	170	81
		setupStore	6	72	14	17	8
		uiStartup	1663	2733	1965	238	114