Feature Request: cimg/node browsers arm64 support

[berickson1]

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Describe the Feature Request
Create and publish arm64 image for cimg/node:latest-browsers

Is your feature request related to a particular problem?
cimg/node:latest images contain support for arm64 (thank you!), but the need to run Cypress test with the -browsers images prevents us from leveraging the new arm support.

Why arm64? CircleCI runners on arm have more ram allocated per CPU than similar linux-based x64 runners. We'd like to use arm64 across the board to help improve stability of some memory-intensive builds.

Why can't you use existing -browsers images for specific tasks only? Due to some workspace-level caching of binaries, all build nodes need to have the same architecture.

Additional Data
I see in the original PR to add arm64 support to cimg-shared by @BytesGuy, browser variants were skipped due to an issue related to Selenium service, but I wasn't able to figure out exactly what that was

How will this feature request benefit CircleCI jobs using this image?
This will increase the support for arm-based images, allowing customers to more easily transition to these images without having to re-think part of their build pipeline

Describe the solution you would like to see
I would like to see cimg/node publishing 20.8.1-browsers and above with linux/arm64 tags and support. This image should contain the same set of browsers/tools that are included in the linux/amd64 build

Describe alternatives you have considered
The alternatives for us are a revamp of the current build pipeline or staying on linux/amd64 images, both of which are undesirable

[mastamark]

+1 ; only I'd advocate for 18.14-browsers and newer if possible.