Replaces saml-idp with @node-saml/node-saml for tests#2278

DarshitChanpura wants to merge 2 commits intoopensearch-project:mainopensearch-project/security-dashboards-plugin:mainfrom

DarshitChanpura:replace-saml-idpDarshitChanpura/security-dashboards-plugin:replace-saml-idpCopy head branch name to clipboard