tests: fix the detection of dirstate-v2 in hghave.py stable

tests: fix the detection of dirstate-v2 in hghave.py

--- a/tests/hghave.py	Thu Nov 17 14:37:43 2022 +0000
+++ b/tests/hghave.py	Fri Nov 18 13:52:18 2022 +0000
@@ -1077,8 +1077,8 @@
 @check('dirstate-v2', 'using the v2 format of .hg/dirstate')
 def has_dirstate_v2():
     # Keep this logic in sync with `newreporequirements()` in `mercurial/localrepo.py`
-    return has_rust() and matchoutput(
-        'hg config format.exp-rc-dirstate-v2', b'(?i)1|yes|true|on|always'
+    return matchoutput(
+        'hg config format.use-dirstate-v2', b'(?i)1|yes|true|on|always'
     )