Add AWS-managed alternative JavaScript runtime(s)

[o-alexandrov]

Problem

Running an alternative JavaScript runtime is practically impossible due to an extreme difference in the cold starts.
Why:

• the latest versions of alternative JavaScript runtimes on Linux weigh 32MB for Bun 0.6.13, 38MB for Deno 1.35.0
• the size of the alternative runtimes, distributed as a Lambda Layer will be the cause of a higher cold start and it's unlikely Bun & Deno would decrease the size dramatically in the next couple of years

Request

There are alternative runtimes, such as Deno custom runtime & Bun custom runtime for AWS Lambda.

[o-alexandrov]

@jtuliani
cc @Jarred-Sumner @Electroid
The extreme cold starts for JavaScript custom runtime layers is proven by data in this PR maxday/lambda-perf#604

• no matter how fast Bun, Deno would be, the non-provided by AWS JavaScript runtimes would probably always be slower for most of the use cases

[lucajung]

+1