update go-sdk client api calls to be inline with current state

[skyerus]

Signed-off-by: Skye Gill gill.skye95@gmail.com

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[skyerus]

dependent on https://github.com/open-feature/go-sdk/pull/77 & https://github.com/open-feature/go-sdk/pull/75 & https://github.com/open-feature/go-sdk/pull/74