chore: add user IDs to send page analytics

[BZahory]

Description

We currently anonymize all send page events. This PR introduces logic that allows for explicitly overriding this logic for vetted send page events, so that we can create funnels to track user dropoff.

Related issues

Fixes:

Manual testing steps

1. Log the payload in _track()
2. Complete a swap+send transaction, starting from the home page
3. Ensure send flow events are fired w/ user IDs

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.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

Attention: Patch coverage is 30.76923% with 9 lines in your changes missing coverage. Please review.

Project coverage is 70.01%. Comparing base (187da88) to head (12888af).

Files	Patch %	Lines
...omponents/app/assets/nfts/nfts-items/nfts-items.js	0.00%	1 Missing ⚠️
ui/components/app/wallet-overview/coin-buttons.tsx	0.00%	1 Missing ⚠️
...r-amount/asset-picker-modal/asset-picker-modal.tsx	0.00%	1 Missing ⚠️
.../asset-picker-amount/asset-picker/asset-picker.tsx	0.00%	1 Missing ⚠️
.../multichain/pages/send/components/address-book.tsx	0.00%	1 Missing ⚠️
...ltichain/pages/send/components/recipient-input.tsx	0.00%	1 Missing ⚠️
...nts/multichain/pages/send/components/recipient.tsx	0.00%	1 Missing ⚠️
ui/components/multichain/pages/send/send.js	50.00%	1 Missing ⚠️
ui/pages/asset/components/token-buttons.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #26600   +/-   ##
========================================
  Coverage    70.01%   70.01%           
========================================
  Files         1410     1410           
  Lines        49130    49130           
  Branches     13739    13739           
========================================
  Hits         34398    34398           
  Misses       14732    14732           

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[metamaskbot]

Builds ready [12888af]

• 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
  • common: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9
  • content-script: 0
  • offscreen: 0
  • ui: 0, 1, 10, 11, 2, 3, 4, 5, 6, 7, 8, 9

Page Load Metrics (70 ± 6 ms)

Platform	Page	Metric	Min (ms)	Max (ms)	Average (ms)	StandardDeviation (ms)	MarginOfError (ms)
Chrome	Home	firstPaint	72	151	94	18	9
		domContentLoaded	54	106	68	12	6
		load	57	106	70	12	6
		domInteractive	20	41	26	5	3

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

• background: 55 Bytes (0.00%)
• ui: 312 Bytes (0.00%)
• common: 0 Bytes (0.00%)