when removal is executed as a part of restoration

IngressConfig fields ExtraEnvs, ExtraVolumes and ExtraVolumeMounts are k8s types.
The yaml unmarshal done in ParseConfig can't unmarshal these properly because they have
nested fields without yaml tags. This commit adds logic to unmarshal
these fields separately so all nested fields get unmarshaled too.

The fields for ExtraEnv, extraVolumes and extraVolumeMounts for ingress
addon refer the k8s native types EnvVar, Volume and VolumeMounts.
The k8s native types have json tags, so this commit adds a template func to
first marshal and get json encoding and then convert to yaml.

In addition to storing it on the disk

Earlier we checked for AlwaysPullImages only if PodSecurityPolicy
is true clause, need both checks separately.