SB Lern Release 5.3

[rhwarrier]

Release plan:

Design Discussions : 16 Jan '23 - 27 Jan '23 (2 weeks)
Sprint 01 : 17 Apr '23 - 28 Apr '23 (2 weeks)
Sprint 02 : 01 May '23 - 12 May '23 (2 weeks)
Regression & Testing : 15 May '23 to 25 May (2 weeks)
Production Release : 26 May '23

Actual Release Date : 27 May '23

Sign off link : https://github.com/orgs/Sunbird-Lern/discussions/52#discussioncomment-6019357
Release list for Lern 5.3 on Jira