fix: add azp claim in auth_code flow only

* fixes #752

Co-authored-by: tronghn <trong.huu.nguyen@nav.no>
Co-authored-by: kimtore <kim.tore.jensen@nav.no>

Author: 3 people

src/main/kotlin/no/nav/security/mock/oauth2/token/OAuth2TokenCallback.kt

@@ -62,7 +62,9 @@ open class DefaultOAuth2TokenCallback
                 "tid" to issuerId,
             ).apply {
                 putAll(claims)
-                put("azp", tokenRequest.clientIdAsString())
+                if (tokenRequest.grantType() == GrantType.AUTHORIZATION_CODE) {
+                    put("azp", tokenRequest.clientIdAsString())
+                }
             }
 
         override fun tokenExpiry(): Long = expiry