[COMMON] Make our common charts compatible with helm 3.7+

Helm 3.7.0 introduced a new .Chart variable named IsRoot.
In the same time they refactored the representation of .Chart and it
no longer is a dictionary but a structure which confuses
mergeOverride.
In order to keep our tricks working we need to skip .Chart while doing
a deepCopy of our current context.

Issue-ID: OOM-1
Signed-off-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Change-Id: I230e2ba460ddf09377d8de6c1366d4fd82f764cd
2 files changed