 [autoscaler][aws] Fix example minimal (#27075)
 [autoscaler][aws] Fix example minimal (#27075)

Why are these changes needed?
The DLAMI moved underneath us and broke for 2 reasons.

The AMI's snapshot size increased to 140 GB which was more than our hardcoded max EBS volume size of 100GB
The AMI dropped support for python 3.7 and only has 3.8 now.
The solutions short term solutions are simple.

Allocate a bigger EBS volume.
Use the tensorflow 3.8 env.
Related issue number
Closes #26368

Co-authored-by: Alex <60c6d277a8bd81de7fdde19201bf9c58a3df08f4@anyscale.com>
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