Remove image list cm and edb config secret during migration

[bluzarraga]

What this PR does / why we need it: Resolves issue with certain resources being created by the edb chart. These resources are ok to be regenerated and do not need to be carried over so we can remove them in the migration process and allow the EDB chart to recreate them as normal.

Which issue(s) this PR fixes:
Fixes #

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1. How the test is done?

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[bitscuit]

/lgtm

[ibm-ci-bot]

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This pull-request has been approved by: bitscuit, bluzarraga

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