CEF 139 Intel builds are unusably slow on Apple Silicon ARM machines

[callumlinden]

Environment

Internal test build of Viewer from this PR

macOS only

Description

The Viewer built from the PR in the description using CEF 139 is unusably slow. The login page can take 20+ seconds to appear for example.

The official CEF applications built for Intel are similarly slow on Apple Silicon machines.

The official CEF applications built for Apple Silicon behave normally on Apple Silicon machines.

We believe the reason is that newer versions of Chromium do not play well with Rosetta 2 - implication is that there is no easy way around this other that using architecture native builds.

Reproduction steps

1. Install macOS Viewer as normal
2. Open it
3. Notice it takes 20+ seconds for the login page to appear

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