Add initial version of vllm rocm build script

[Daniel-Schenker]

Checklist

• Have you checked and followed all the points mention in the CONTRIBUTING.MD
• Have you validated script on UBI 9 container (UBI10)
• Did you run the script(s) on fresh container with set -e option enabled and observe success ?
• Did you have Legal approvals for patch files ?

This draft PR adds the initial version of the vllm rocm build script. This PR is a WIP as the script needs further updates once its dependencies are all added and ingested by devpi. Currently, the script expects local wheels for packages like z3, tilelang, runai-model-streamer, and triton. It also expects rocm to already be installed in the build environment. The script in this PR will be updated once the dependent packages are available upstream.

[Daniel-Schenker]

@cdeepali I have opened this PR as a draft so that your team can see the format of this build script. Please do not merge yet as there are changes still needed as stated above.

[Daniel-Schenker]

@janani66 @cdeepali I have updated the vllm build script with the rocm install from the repo. The script still needs local wheels for various vllm dependencies (while we await the release of them on devpi). Additionally, this script uses EPEL and ALMALinux repos for python 3.13 and a few other system dependencies. Not sure the best way to get around this.

[janani66]

I am going to let @cdeepali respond to your questions .

[cdeepali]

@janani66 @cdeepali I have updated the vllm build script with the rocm install from the repo. The script still needs local wheels for various vllm dependencies (while we await the release of them on devpi). Additionally, this script uses EPEL and ALMALinux repos for python 3.13 and a few other system dependencies. Not sure the best way to get around this.

@Daniel-Schenker

1. We need not use EPEL to install python 3.13. The build script can rather use python3.12 which is available on UBI10 repos. The wrapper script used by CI internally builds package on multiple python versions -Python 3.12 - 3.14 for UBI10, so it updates the package build script accordingly for each such python version build. And it builds Python 3.13 from source for Python 3.13 builds.
2. I don't think we can use the ALMALinux repo as well. But looks like it is being used for the libdrm-devel package and its dependencies.
   I do see that libdrm-devel v2.4.128 is available on UBI10 repos. Can this be used ?

libdrm-devel.ppc64le 2.4.128-1.el10 rhel-10-for-ppc64le-appstream-rpms

cc: @janani66

[Daniel-Schenker]

@cdeepali

1. I cannot easily alter the script to use python 3.12 as we do not have a rocm torch wheel for python 3.12. That is why EPEL and python 3.13 are still in use.
2. This should be sufficient, unsure why I was unable to install this package from that repo. Is there something extra needed to enable this rhel-10-for-ppc64le-appstream-rpms repo?