Summary:
Fix up dockerfile for aarch64
Original commit: 43666daf129ea1a0ca399531a49874e1d66e185c / D45094

Test Plan: Build docker image locally for both arches using the released 2.20.10.0-b29 tarballs

Reviewers: #db-approvers, devops, steve.varnau

Reviewed By: #db-approvers, steve.varnau

Subscribers: devops, rthallam

Differential Revision: https://phorge.dev.yugabyte.com/D45124