Are these updated settings Kiota-specific or will they apply to all clients?

AddSingleQuotesForStringParameters is actually a bugfix, but Sam was worried it'd break some people, so we added a setting, IMHO this should be true by default
AddEnumDescriptionExtension just adds a x-ms-enum-description extension for enum members descriptions, it's more information (autorest uses the same extension)
DeclarePathParametersOnPathItem is optimization, to avoid duplicating parameters that are common to operations. I think the optimization will also be beneficial to other generators
ErrorResponsesAsDefault makes the description more specific, using 4XX and 5XX error code classes instead of default (which could be something else than an error)