Copy updated test certificates and related data (keys, CSR, etc.) from
development. This replaces certificates that will expire on 2023-09-07,
causing the unit tests to fail. This also adds new data files that are not
used, and moves some files.
The replacement data is good until 2023-12-31.
The update causes some parsing unit tests to fail because the new
certificates have a different expiry date. This will be fixed in a
subsequent commit.
```
git checkout dc2d7cce02a273f6ec6a7cd78512dfeaf633a3a5 -- tests/data_files tests/src/test_certs.h tests/src/certs.c
```
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
