build-unit-test-docker: add openssl-3

OpenSSL 3 introduced significant compatibility issues from OpenSSL 1
but isn't included in Ubuntu yet.  Manually install it so that we can
perform CI against the same APIs that will be included in Yocto.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I6f44cc1dd94f40ac1673a40453ed08c8f85f8134
1 file changed