fix: hackily wait longer for linea swap approval tx to increase chance of success

[martahj]

Description

Linea seems to be taking longer than other chains to process the approve transaction after it is submitted, so the trade transaction is erroring. This PR adds a hacky workaround where we artificially delay if we're on Linea to give the trade transaction more time. In the future, we'd want to avoid this hack, but for now it should increase the swap success rate on Linea.

With the delay, the token symbol also wasn't immediately populating on the awaiting swap page, so this PR also updates how it's retrieved.

Related issues

Fixes: #27804

Manual testing steps

1. Start a swap on Linea with a token that you have not granted approval for
2. Observe that the swap does not fail

Screenshots/Recordings

Before

375871389-343ab5ee-1bcb-45cb-9d42-c753b80c1fea.mov

After

LineaSwap.mov

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Pre-merge reviewer checklist

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• 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.

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[metamaskbot]

Builds ready [697d1f9]

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Page Load Metrics (1683 ± 73 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	203	2098	1551	457	219
		domContentLoaded	1489	2089	1664	152	73
		load	1493	2107	1683	152	73
		domInteractive	16	108	40	23	11

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 151 Bytes (0.00%)
• common: 352 Bytes (0.00%)

[metamaskbot]

Builds ready [bef65f6]

• 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 (1732 ± 110 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1495	2392	1740	223	107
		domContentLoaded	1480	2299	1695	201	96
		load	1488	2409	1732	230	110
		domInteractive	18	202	51	42	20

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 151 Bytes (0.00%)
• common: 352 Bytes (0.00%)

[sonarqubecloud]

Quality Gate failed

Failed conditions
42.1% Coverage on New Code (required ≥ 80%)

See analysis details on SonarCloud

[metamaskbot]

Builds ready [c2bcb19]

• 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 (1786 ± 62 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	1493	2119	1787	133	64
		domContentLoaded	1486	2102	1760	128	61
		load	1495	2111	1786	130	62
		domInteractive	27	104	44	19	9

Bundle size diffs [🚨 Warning! Bundle size has increased!]

• background: 0 Bytes (0.00%)
• ui: 151 Bytes (0.00%)
• common: 352 Bytes (0.00%)