director.py: restore READTHEDOCS_VERSION_[TYPE|NAME] (#9052)

These env vars were accidentally removed in
#9002.  This commit
naively restores the 2 missing env variables in the new
get_rtd_env_vars() location.

Signed-off-by: Jeff Squyres <jeff@squyres.com>

readthedocs/doc_builder/director.py

@@ -401,6 +401,8 @@ def get_rtd_env_vars(self):
         env = {
             "READTHEDOCS": "True",
             "READTHEDOCS_VERSION": self.data.version.slug,
+            "READTHEDOCS_VERSION_TYPE": self.data.version.type,
+            "READTHEDOCS_VERSION_NAME": self.data.version.verbose_name,
             "READTHEDOCS_PROJECT": self.data.project.slug,
             "READTHEDOCS_LANGUAGE": self.data.project.language,
         }