Fix "verify wallet" button on tip dialog rewards onboarding

[zenparsing]

Resolves brave/brave-browser#15705

Submitter Checklist:

• I confirm that no security/privacy review is needed, or that I have requested one
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally: npm run test -- brave_browser_tests, npm run test -- brave_unit_tests, npm run lint, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

[emerick]

LGTM

[kjozwiak]

post-init failed due to audit-deps warning(s) as per https://ci.brave.com/job/pr-brave-browser-ksmith-jp-tip-verify-button-post-init/1/execution/node/145/log/. However, the warning(s) are a known issue and unrelated to this RR.

test-browser failed on Linux as per https://ci.brave.com/job/pr-brave-browser-ksmith-jp-tip-verify-button-linux/1/testReport/. However, these are known intermittent issues unrelated to this specific PR.

linux / test-browser / BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath/PreferencesForVersion062WithRewardsEnabled_ForUnsupportedLocale_ForUnsupportedLocale_RewardsShouldBeEnabled_AdsShouldBeDisabled
linux / test-browser / BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath/PreferencesForVersion070WithRewardsAndAdsEnabled_ForSupportedLocale_ForNewlySupportedLocale_RewardsShouldBeEnabled_AdsShouldBeDisabled
linux / test-browser / BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath/PreferencesForVersion070WithRewardsAndAdsEnabled_ForSupportedLocale_ForUnsupportedLocale_RewardsShouldBeEnabled_AdsShouldBeEnabled
linux / test-browser / BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath/PreferencesForVersion070WithRewardsAndAdsEnabled_ForUnsupportedLocale_ForUnsupportedLocale_RewardsShouldBeEnabled_AdsShouldBeDisabled
linux / test-browser / BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath/PreferencesForVersion072WithRewardsAndAdsEnabled_ForSupportedLocale_ForNewlySupportedLocale_RewardsShouldBeEnabled_AdsShouldBeDisabled

Restarting Win x64 using WIPE_WORKSPACE which hopefully helps.

[zenparsing]

CI

• post-init failed on unrelated audit-deps issue
• linux failed on unrelated BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath tests
• macos failed on unrelated AdBlockServiceTest.CnameCloakedRequestsGetBlocked test
• windows failed on unresolved CI issue when building unit tests, unit tests and browser tests passed locally

[kjozwiak]

Adding the 1.26.x milestone as this landed in master 👍