The certificate was using SHA-1 for signing its certificate, which is
considered 'not good enough' by some TLS libraries.
Regenerate it with SHA-512 and a larger RSA key.
Also include the files needed to generate it.
Pick-to: 6.4 6.3 6.2 5.15
Task-number: QTBUG-106018
Task-number: QTBUG-95123
Change-Id: I535e047d540e663c8cec334695196044173949fc
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
Mårten Nordheim