Auto sync graphql schemas

[taylorsmithgg]

Related issue: https://github.com/TykTechnologies/tyk-operator/issues/587

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Expected Behavior

When deploying a graphql endpoint, there should be an option to turn on auto sync/auto approval/auto update for schema updates.

Current Behavior

When deploying a schemaless graphql ApiDefinition w/the operator, it will delete the current schema on reconciliation.

Possible Solution

Add an option for automatic approval and update on schema update.