Disabling the Moonpay/Bitcoin.com widget [1.17]

[ryanml]

Fixes: brave/brave-browser#12699
Uplifts: #7145

Approved, please ensure that before merging:

• You have checked CI and the builds, lint, and tests all pass or are not related to your PR.
• You have tested your change on Nightly.
• The PR milestones match the branch they are landing to.

After you merge:

• The associated issue milestone is set to the smallest version that the changes is landed on.

[kjozwiak]

Going to restart macOS, Linux & Win x64 as test-browser keeps failing a lot of tests. Usually we have ~1-2 intermittent failures but there appears to be a lot more than usual.

[kjozwiak]

Restarting Win x64 as it appears like CI had issues with the instance as per https://ci.brave.com/job/pr-brave-browser-remove-bdc-1.17-windows/4/execution/node/200/log/.

16:08:13  Cannot contact i-0e690ad4f29a2abe0-windows-swarm-427e4294: hudson.remoting.RequestAbortedException: java.nio.channels.ClosedChannelException
16:13:13  Could not connect to i-0e690ad4f29a2abe0-windows-swarm-427e4294 to send interrupt signal to process

test-browser failed on macOS due to BraveContentBrowserClientTest.RewriteChromeSync crashing as per https://ci.brave.com/job/pr-brave-browser-remove-bdc-1.17-macos/3/execution/node/251/log/.

05:05:15  1 test crashed:
05:05:15      BraveContentBrowserClientTest.RewriteChromeSync (../../brave/browser/brave_content_browser_client_browsertest.cc:215)

Created brave/brave-browser#12753 for the BraveContentBrowserClientTest.RewriteChromeSync issue but the rest appear to be rewards related which isn't related to this PR.

[kjozwiak]

test-browser failed on Win x64 due to BraveContentBrowserClientTest.RewriteChromeSync failing as per https://ci.brave.com/job/pr-brave-browser-remove-bdc-1.17-windows/5/execution/node/247/log/.

20:28:19  1 test crashed:
20:28:19      BraveContentBrowserClientTest.RewriteChromeSync (../../brave/browser/brave_content_browser_client_browsertest.cc:215)

test-browser failed on Linux due to both BraveContentBrowserClientTest.RewriteChromeSync & BraveSchemeLoadBrowserTest.SettingsPageIsNotAllowedInPrivateWindow crashing as per https://ci.brave.com/job/pr-brave-browser-remove-bdc-1.17-linux/7/execution/node/251/log/.

18:41:05  2 tests crashed:
18:41:05      BraveContentBrowserClientTest.RewriteChromeSync (../../brave/browser/brave_content_browser_client_browsertest.cc:215)
18:41:05      BraveSchemeLoadBrowserTest.SettingsPageIsNotAllowedInPrivateWindow (../../brave/browser/brave_scheme_load_browsertest.cc:225)

Created brave/brave-browser#12753 for the BraveContentBrowserClientTest.RewriteChromeSync issue but the rest appear to be rewards related which isn't related to this PR.

[kjozwiak]

Uplift into 1.17.x approved after deliberating with @brave/uplift-approvers. QA has verified the PR on Nightly via #7145 (comment).