macOS x64 browser tests should consistently pass in CI without retrying the entire testing stage

[wknapik]

Description

Browser tests have their own built-in retry mechanism, but this is not sufficient on its own. We had to rebuild often enough, that we ended up adding an automated retry in CI for the entire browser test stage, including a notification whenever it's triggered. In the last 3 months we got ~160 such notifications (Slack search: "test-browser" "was retried" "times on" in:#devops-bot-dev from:@Jenkins CI) - that's just from the public pipeline.

Each retry extends the build time and increases the size of the build queue for macOS/iOS nodes, causing everyone on the dev/qa teams to wait longer.

Those tests need to consistently pass without a retry for the entire testing stage.

PS. We just added the same retry for network-audit on macos x64, for the same reason.

[wknapik]

Current count (only macos x64, only public builds, excluding PRs):

browser test full stage retry notifications: 452

Slack search:

"test-browser" "was retried" "times on" in:#devops-bot-dev from:@Jenkins CI

network audit full stage retry notifications: 143

Slack search:

"audit-network" "was retried" "times on" in:#devops-bot-dev from:@Jenkins CI

full test stage (all tests) failed even after retries: 168

Slack search:

"Failed test" "[empty]" macos-x64 in:#browser-bot from:@Jenkins CI