Need to update REST API docs for V1

[msm1992]

Description: Please add these[1][2][3] API doc changes to REST API docs hosted at

• https://apim.docs.wso2.com/en/latest/develop/product-apis/publisher-apis/publisher-v1/publisher-v1/ and https://apim.docs.wso2.com/en/latest/develop/product-apis/devportal-apis/devportal-v1/devportal-v1/ : for APIM 3.1.0
• https://apim.docs.wso2.com/en/3.0.0/develop/product-apis/publisher-v1/ and https://apim.docs.wso2.com/en/3.0.0/develop/product-apis/devportal-v1/ : for APIM 3.0.0

[1]. https://github.com/wso2-support/carbon-apimgt/pull/2004 [2]. https://github.com/wso2-support/carbon-apimgt/pull/2008 [3]. https://github.com/wso2-support/carbon-apimgt/pull/2007

Affected Product Version: APIM 3.1.0, APIM 3.0.0

[Mariangela]

Fixed in 3.0.0 and 3.1.0.