Able to configure the shm size in Playground

[kerthcet]

What would you like to be added:

When serving with ray for multi-host cases, you should be able to set the /dev/shm size to improve the performance, see the log here:

2025-01-14 03:08:29,081	WARNING services.py:2022 -- WARNING: The object store is using /tmp instead of /dev/shm because /dev/shm has only 67108864 bytes available. This will harm performance! You may be able to free up space by deleting files in /dev/shm. If you are inside a Docker container, you can increase /dev/shm size by passing '--shm-size=5.04gb' to 'docker run' (or add it to the run_options list in a Ray cluster config). Make sure to set this to more than 30% of available RAM.

Ray natively supports a distributed shared memory store for large objects (objects that are bigger than 100KB) to efficiently manage the memory usage of the cluster. When using Linux, Ray tries to use /dev/shm for the shared memory. But if this is too small, Ray automatically fallback to /tmp folder, which usually can cause worse performance than using the shared memory.

Why is this needed:

Completion requirements:

This enhancement requires the following artifacts:

• Design doc
• API change
• Docs update

The artifacts should be linked in subsequent comments.

[kerthcet]

/milestone v0.2.0

[kerthcet]

/assign