cquery mess up lsp--execute-command

[yyoncho]

See emacs-lsp/lsp-java#93 (comment)

cquery should not add advice on lsp--execute-command but it should use :action-handlers when registering the lsp-client. (or eventually, use the new mechanism with defmethod introduced by @MaskRay in emacs-lsp/lsp-mode@cfde310) .

@zijianyue