src/test/librados: enable FastEC tests with crimson

src/test/librados: enable FastEC tests with crimson

This commit enables fast EC tests such that they are run for crimson
OSDs. This is done towards an effort to establish reliable fast EC
support in crimson.

These tests where previously enabled as part of another PR but
ultimately were not merged due to insufficient confidence.

Fixes: https://tracker.ceph.com/issues/77910
Signed-off-by: Shraddha Agrawal <shraddha.agrawal000@gmail.com>