feat(stage): add Formatted/Unformatted toggle to the staging page

- Mirrors the review page's toggle: getstagetable.sas now also webouts
  fmt_stagetable (SAS-formatted), selectFormattedRows() picks between it
  and the raw stagetable, falling back to raw if fmt data is absent
- Adds stage.cy.ts e2e coverage and wires it into both build.yaml and
  release.yaml's cypress --spec lists (previously out of sync with
  each other on viewbox.cy.ts too)

sas/mocks/sasjs/services/auditors/getstagetable.js

@@ -4,6 +4,10 @@ _webout = `{"SYSDATE" : "26SEP22"
 [
 {"PRIMARY_KEY_FIELD":0 ,"SOME_BESTNUM":44 ,"SOME_CHAR":"this is changed data" ,"SOME_DATE":42 ,"SOME_DATETIME":42 ,"SOME_DROPDOWN":"Option 1" ,"SOME_NUM":42 ,"SOME_SHORTNUM":3 ,"SOME_TIME":42 ,"_____DELETE__THIS__RECORD_____":"No" }
 ]
+, "fmt_stagetable":
+[
+{"PRIMARY_KEY_FIELD":"0" ,"SOME_BESTNUM":"44" ,"SOME_CHAR":"this is changed data" ,"SOME_DATE":"12FEB1960" ,"SOME_DATETIME":"01JAN1960:00:00:42" ,"SOME_DROPDOWN":"Option 1" ,"SOME_NUM":"42" ,"SOME_SHORTNUM":"3" ,"SOME_TIME":"0:00:42" ,"_____DELETE__THIS__RECORD_____":"No" }
+]
 ,"_DEBUG" : ""
 ,"_METAUSER": "sasdemo@SAS"
 ,"_METAPERSON": "sasdemo"