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: devops, steve.varnau, #db-approvers

Reviewed By: steve.varnau

Subscribers: devops, rthallam

Differential Revision: https://phorge.dev.yugabyte.com/D45161