add AREnableMyCollectionInsights and AREnableMyCollectionInsightsPhase1Part1 feature flags
add AREnableMyCollectionInsights and AREnableMyCollectionInsightsPhase1Part1 feature flags

Co-authored-by: Daria Kozlova <92130b1b4cb42d214fa3c1be2c944135411814dc@artsymail.com>

artsy/echo,artsy/echo