Unexport consts in hooks package

[sahidvelji]

Is there a good reason for exporting these constants? Either way, the identifiers should be camelCased or PascalCased, not SCREAMING_SNAKE_CASE.

go-sdk/openfeature/hooks/logging_hook.go

Lines 11 to 20 in 42e33ba

	DOMAIN_KEY = "domain"
	PROVIDER_NAME_KEY = "provider_name"
	FLAG_KEY_KEY = "flag_key"
	DEFAULT_VALUE_KEY = "default_value"
	EVALUATION_CONTEXT_KEY = "evaluation_context"
	ERROR_MESSAGE_KEY = "error_message"
	REASON_KEY = "reason"
	VARIANT_KEY = "variant"
	VALUE_KEY = "value"
	STAGE_KEY = "stage"