feat: [PL-58826]: Create use-hpa-for-autoscaling.md

[kapilgarg1996]

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Description

In SMP version 0.23.0, we have added support for configuring service's HPA through global overrides and also enhanced the number of fields supported for HPA.

• Please describe your changes: Guide to configure HPA in SMP
• Jira/GitHub Issue numbers (if any): PL-58826
• Preview links/images (Internal contributors only): __________________

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