infra: update the manifests for RD-INFRA-2022.03.31 release

The RD-INFRA-2022.03.31 release includes refresh of RD-Edmunds and RD-N2
platform variants. The pinned manifest files of these platforms have
been updated accordingly for this release.

Signed-off-by: Thomas Abraham <thomas.abraham@arm.com>
Change-Id: I0c170b7021a63439d9d511846e06fbfc10978d16