feat(actions): Add refresh token to post authentication action context (#9493)

# Which Problems Are Solved

- Refresh Tokens issued by third party authentication providers are lost

# How the Problems Are Solved

- Allows the existing post authentication action to capture the refresh
token

# Additional Changes

- Docs updated to reflect the new property

# Additional Context

- Partially addresses #7851 by allowing the refresh token to be
captured.

Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

docs/docs/apis/actions/external-authentication.md

@@ -18,6 +18,8 @@ The trigger is represented by the following Ids in the API: `TRIGGER_TYPE_POST_A
 The first parameter contains the following fields
   - `accessToken` *string*  
     The access token returned by the identity provider. This can be an opaque token or a JWT
+  - `refreshToken` *string*  
+    The refresh token returned by the identity provider if there is one. This is most likely to be an opaque token.
   - `claimsJSON()` [*idTokenClaims*](../openidoauth/claims)  
     Returns all claims of the id token
   - `getClaim(key)` *Any*