feat: add pluggable override for course home progress username obfuscation (#2555)

* feat: add pluggable override for course home progress username obfuscation

ENT-11572

* fix: pylint disable formatting

* chore: isort fix

* chore: bump version

* chore: address pr comments

* test: add coverage

* test: bring override in line with team conventions

* chore: fix pylint issues

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Co-authored-by: Marlon Keating <mkeating@2u.com>