Ads upgrade browser test crash

[emerick]

@mariospr mentioned that the *WithRewards[AndAds]Enabled ads-related browser tests are crashing on Linux.

Stack trace:

[ RUN      ] BraveAdsBrowserTest/BraveAdsUpgradeBrowserTest.UpgradePath/PreferencesForVersion062WithRewardsEnabled_ForUnsupportedLocale_ForUnsupportedLocale_RewardsShouldBeEnabled_AdsShouldBeDisabled
[1167073:1167073:0518/171651.722365:ERROR:power_monitor_device_source_stub.cc(11)] Not implemented reached in virtual bool base::PowerMonitorDeviceSource::IsOnBatteryPower()
[1167073:1167073:0518/171651.723260:INFO:content_main_runner_impl.cc(1077)] Chrome is running in full browser mode.
[1167995:1167995:0518/171651.932630:WARNING:vaapi_wrapper.cc(588)] VAAPI video acceleration not available for swiftshader
[1167995:1167995:0518/171651.933145:ERROR:gpu_init.cc(440)] Passthrough is not supported, GL is swiftshader
[1167073:1167073:0518/171652.079992:WARNING:external_provider_impl.cc(483)] Malformed extension dictionary for extension: odbfpeeihdkbihmopkbjmoonfanlbfcl.  Key external_update_url has value "", which is not a valid URL.
[1168133:1169065:0518/171652.512876:WARNING:simple_synchronous_entry.cc(1331)] Could not open platform files for entry.
[1168133:1169066:0518/171652.513685:WARNING:http_cache_transaction.cc(1191)] Unable to open or create cache entry
[1167073:1167073:0518/171652.637581:ERROR:brave_referrals_service.cc(273)] Failed to fetch headers from referral server, error: -11, response code: -1, payload: , url: https://laptop-updates.brave.com/promo/custom-headers
BrowserTestBase received signal: Segmentation fault. Backtrace:
#0 0x7ff220fd1659 base::debug::CollectStackTrace()
#1 0x7ff220ed03f3 base::debug::StackTrace::StackTrace()
#2 0x559a4437d3c6 content::(anonymous namespace)::DumpStackTraceSignalHandler()
#3 0x7ff210c3c210 (/usr/lib/x86_64-linux-gnu/libc-2.31.so+0x4620f)
#4 0x7ff220f3aa64 base::RunLoop::Quit()
#5 0x559a417d5437 brave_rewards::RewardsServiceImpl::OnLedgerInitialized()
#6 0x559a41794919 base::internal::Invoker<>::RunOnce()
#7 0x559a422d482b bat_ledger::mojom::BatLedger_Initialize_ForwardToCallback::Accept()
#8 0x7ff22036218b mojo::InterfaceEndpointClient::HandleValidatedMessage()
#9 0x7ff22036583f mojo::MessageDispatcher::Accept()
#10 0x7ff220363527 mojo::InterfaceEndpointClient::HandleIncomingMessage()
#11 0x7ff22036ad72 mojo::internal::MultiplexRouter::ProcessIncomingMessage()
#12 0x7ff22036a31b mojo::internal::MultiplexRouter::Accept()
#13 0x7ff22036583f mojo::MessageDispatcher::Accept()
#14 0x7ff22035b244 mojo::Connector::DispatchMessage()
#15 0x7ff22035bc00 mojo::Connector::ReadAllAvailableMessages()
#16 0x7ff22035bf86 mojo::Connector::CallDispatchNextMessageFromPipe()
#17 0x7ff22035c9f4 base::internal::Invoker<>::RunOnce()
#18 0x7ff220f642bc base::TaskAnnotator::RunTask()
#19 0x7ff220f86577 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl()
#20 0x7ff220f85d7d base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWork()
#21 0x7ff220eff6c7 base::(anonymous namespace)::WorkSourceDispatch()
#22 0x7ff21126317d g_main_context_dispatch
#23 0x7ff211263400 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.6400.6+0x523ff)
#24 0x7ff2112634a3 g_main_context_iteration
#25 0x7ff220eff1b2 base::MessagePumpGlib::Run()
#26 0x7ff220f870fb base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run()
#27 0x7ff220f39f7a base::RunLoop::Run()
#28 0x559a4437d223 content::BrowserTestBase::InitializeNetworkProcess()
#29 0x559a4437c815 content::BrowserTestBase::ProxyRunTestOnMainThreadLoop()
#30 0x559a4282cb85 (anonymous namespace)::InvokeClosureAfterGetPluginCallback()
#31 0x559a42941a6b ChromeBrowserMainParts::PreMainMessageLoopRunImpl()
#32 0x559a42940e94 ChromeBrowserMainParts::PreMainMessageLoopRun()
#33 0x7ff21e7a5fef content::BrowserMainLoop::PreMainMessageLoopRun()
#34 0x7ff21ed6db27 content::StartupTaskRunner::RunAllTasksNow()
#35 0x7ff21e7a5c65 content::BrowserMainLoop::CreateStartupTasks()
#36 0x7ff21e7a8a7b content::BrowserMainRunnerImpl::Initialize()
#37 0x7ff21e7a44c7 content::BrowserMain()
#38 0x7ff21f229f42 content::ContentMainRunnerImpl::RunBrowser()
#39 0x7ff21f22999d content::ContentMainRunnerImpl::Run()
#40 0x7ff21f2275ba content::RunContentProcess()
#41 0x7ff21f22769d content::ContentMain()
#42 0x559a4437be77 content::BrowserTestBase::SetUp()
#43 0x559a4325eb83 InProcessBrowserTest::SetUp()
#44 0x559a4199e40e testing::Test::Run()
#45 0x559a4199f5e0 testing::TestInfo::Run()
#46 0x559a419a0217 testing::TestSuite::Run()
#47 0x559a419b3a77 testing::internal::UnitTestImpl::RunAllTests()
#48 0x559a419b33d9 testing::UnitTest::Run()
#49 0x559a432bacae base::TestSuite::Run()
#50 0x559a432b01d2 ChromeTestSuiteRunner::RunTestSuite()
#51 0x559a443a1186 content::LaunchTests()
#52 0x559a432b04a4 LaunchChromeTests()
#53 0x559a427fca88 main
#54 0x7ff210c1d0b3 __libc_start_main
#55 0x559a415da03a _start