[FIX] Increase max volume in default installations

[GiladShapira94]

🛠️ Changes Made

1. Increase the amount of max volumes as the all in one uses 8 by default
2. Create one volume for each bucket

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✅ Checklist

• I have tested the changes in this PR
• I confirmed whether my changes require a change in documentation and if so, I created another PR in MLRun for the relevant documentation.
• I confirmed whether my changes require a changes in QA tests, for example: credentials changes, resources naming change and if so, I updated the relevant Jira ticket for QA.
• I increased the Chart version in charts/mlrun-ce/Chart.yaml.
• I confirmed that the installation works both on a local Docker Desktop environment and on a real cluster when using the required prerequisites.

🔗 References

• Ticket link: https://iguazio.atlassian.net/browse/CEML-696