Temporary workaround for ectest.c for [extended tests]

Temporary workaround for ectest.c for [extended tests]

[extended tests]

This is a temporary workaround for issue #9251, which contains a full
discussion of the real problem.

As a temporary workaround, we test `EC_GROUP_new_from_ecparameters()`
against a curve that does not currently have alternative
implementations.

The proper fix is dependant on resolution of issue #8615

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/9474)