[PLAT-14678] - feat : Export All Metrics to pdf

Summary:
Created a new Preview Modal and list all the metrics and gave an option to download all metrics

**Pending** : Integrate with Runtime Config

Test Plan:
Tested manually

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Reviewers: kkannan

Reviewed By: kkannan

Subscribers: yugaware, ui

Differential Revision: https://phorge.dev.yugabyte.com/D36943

Author: Lingeshwar