haproxy update to 1.19.3-bb.3

General MR

Summary

• enable istio hardening during tests

Relevant logs/screenshots

n/a

Linked Issue

mr - big-bang/product/packages/haproxy!28 (merged) issue - big-bang/product/packages/haproxy#18 (closed)

Upgrade Notices

n/a

closes big-bang/product/packages/haproxy#18 (closed)