add pytest-subtests package (#29536)

old-commit-hash: 2cd311da29

poetry.lock

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:84f8705c459327c978b80ba946251e21c9f93076a3bebb5c823dbbf2defbcef7
-size 370448
+oid sha256:5927a7ae645bd73419b2d96501b71e1baa10a6e2f49cf42b043e8a689a7d68bc
+size 370950

pyproject.toml

@@ -120,6 +120,7 @@ pygame = "*"
 pyprof2calltree = "*"
 pytest = "*"
 pytest-cov = "*"
+pytest-subtests = "*"
 pytest-xdist = "*"
 scipy = "*"
 sphinx = "*"