Driver implementers need to regenerate wrappers. This will use Jinja2 as
discussed in
https://github.com/ARMmbed/mbedtls/pull/5067#discussion_r738794607
On the development branch, driver integration is always needed to generate
the driver wrapper and thus to build the library, so this requirement
applies to everyone, not just driver implementers. In releases, we plan to
include a default driver wrapper with support for basic use cases only,
meaning that the line `-r driver.requirements.txt` should be removed from
`basic.requirements.txt` in releases.
Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
