test: [POM] Migrate edit network rpc e2e tests and create related page class functions

[chloeYue]

Description

• Migrate test/e2e/tests/network/multi-rpc.spec.ts e2e tests to Page Object Model (POM) pattern.
• Created edit network related page classes and functions
• Removed unnecessary delay by correctly implementing page object functions
• Objective of this PR is to improve test stability and maintainability, it also reduced flakiness.
• update: it also fixes the flaky test Update Network

Related issues

Fixes: #28163

Manual testing steps

Check code readability, make sure tests pass.

Screenshots/Recordings

Before

After

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]

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 [616eb81]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• 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
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (2084 ± 127 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1829	2941	2091	263	126
		domContentLoaded	1766	2929	2057	267	128
		load	1776	2946	2084	264	127
		domInteractive	15	129	57	25	12
		backgroundConnect	8	76	29	20	10
		firstReactRender	52	198	105	30	15
		getState	4	64	27	25	12
		initialActions	0	1	0	0	0
		loadScripts	1297	2336	1532	242	116
		setupStore	12	92	42	27	13
		uiStartup	1987	3236	2339	284	137

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[metamaskbot]

Builds ready [0089519]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• 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
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (2112 ± 130 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	429	2525	2006	438	210
		domContentLoaded	1677	2555	2085	258	124
		load	1685	2561	2112	270	130
		domInteractive	34	96	61	20	10
		backgroundConnect	9	81	26	24	12
		firstReactRender	51	217	110	32	15
		getState	4	87	17	20	10
		initialActions	0	1	0	0	0
		loadScripts	1175	1886	1499	215	103
		setupStore	11	95	35	26	12
		uiStartup	1897	3032	2357	313	150

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[metamaskbot]

Builds ready [506d3d9]

• builds: chrome, firefox
• builds (beta): chrome
• builds (flask): chrome, firefox
• builds (MMI): chrome, firefox
• builds (test): chrome, firefox
• builds (test-flask): chrome, firefox
• 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
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 12, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (2017 ± 61 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	375	2208	1854	476	229
		domContentLoaded	1784	2329	1985	125	60
		load	1839	2337	2017	128	61
		domInteractive	17	101	51	22	11
		backgroundConnect	9	142	33	33	16
		firstReactRender	50	294	109	49	24
		getState	5	58	20	18	9
		initialActions	0	1	0	0	0
		loadScripts	1320	1661	1476	98	47
		setupStore	12	106	36	27	13
		uiStartup	2076	2746	2267	185	89

Bundle size diffs

• background: 0 Bytes (0.00%)
• ui: 0 Bytes (0.00%)
• common: 0 Bytes (0.00%)

[hjetpoluru]

LGTM