"Subscription Config" for "re-configure" an Operator - Phase 1.5: "Env/EnvFrom" and "Tolerations"

Goal:
OCP console allows users to re-configure how OLM deploys/installs an Operator via the config field in the Subscription object.

Why this is important?
Currently, OLM supports the following configurations:

• Env/EnvFrom - in scope
• Volumes
• VolumeMounts
• Tolerations - in scope
• Resources

This story is focusing on the "Subscription Details" page and is the follow-up story of the Install Operator page.

OCP Console currently already includes UI widgets for most of the above cases.

Related OLM doc:
https://github.com/operator-framework/operator-lifecycle-manager/blob/master/doc/design/subscription-config.md

Acceptance Criteria:
Users can see/edit these configurations on the Subscriptions object after the Operator has been installed/deployed in the console.