fix: patch user/email env-vars after ssh-env-update

If underlying authtype is SSH, environment block will be re-created,
thus discarding username/email env-vars, which subsequently may lead to
git-repo being in a state where some operations are not available (e.g.
creation of commits or notes).

mv patching of related env-vars until after ssh-env is created to avoid
this.

gitutil.py

@@ -143,13 +143,6 @@ def _authenticated_remote(self):
         auth_type = self.git_cfg.auth_type
 
         cmd_env = os.environ.copy()
-        if (user := self.git_cfg.user_name):
-            cmd_env['GIT_AUTHOR_NAME'] = user
-            cmd_env['GIT_COMMITTER_NAME'] = user
-        if (email := self.git_cfg.user_email):
-            cmd_env['GIT_AUTHOR_EMAIL'] = email
-            cmd_env['GIT_COMMITTER_EMAIL'] = email
-
         if auth_type is AuthType.SSH:
             url = self.git_cfg.repo_url
             cmd_env, tmp_id = _ssh_auth_env(git_cfg=self.git_cfg)
@@ -163,6 +156,13 @@ def _authenticated_remote(self):
         else:
             raise NotImplementedError
 
+        if (user := self.git_cfg.user_name):
+            cmd_env['GIT_AUTHOR_NAME'] = user
+            cmd_env['GIT_COMMITTER_NAME'] = user
+        if (email := self.git_cfg.user_email):
+            cmd_env['GIT_AUTHOR_EMAIL'] = email
+            cmd_env['GIT_COMMITTER_EMAIL'] = email
+
         remote = git.remote.Remote.add(
             repo=self.repo,
             name=random_str(),