### Description

Currently, the [`tryAuthenticateToken`](https://github.com/elastic/elasticsearch/blob/55088d154d1764a6d4fa8e9078bde9da1e9ff9a5/x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/TokenService.java#L458) method calls `decodeAndValidateToken` which ends up sending two `GetRequest` for the same token ID. First in [`decodeToken`](https://github.com/elastic/elasticsearch/blob/55088d154d1764a6d4fa8e9078bde9da1e9ff9a5/x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/TokenService.java#L602) and second in [`checkIfTokenIsValid`](https://github.com/elastic/elasticsearch/blob/55088d154d1764a6d4fa8e9078bde9da1e9ff9a5/x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/TokenService.java#L1977). The second call is unnecessary as we already fetched the access token in the first call, it's just simply dropped. We should refactor these two methods to avoid sending second get request just to validate the access token.
x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/TokenService.java
assert response.getId().equals(tokenDoc.id());
                                        innerRefresh(refreshToken, new Doc(response), clientAuth, backoff, refreshRequested, listener);
                                    } else {
                                        logger.warn("could not find token document [{}] for refresh", tokenDoc.id());
                                        onFailure.accept(invalidGrantException("could not refresh the requested token"));
                                    }
                                }
                                @Override
                                public void onFailure(Exception e) {
                                    if (isShardNotAvailableException(e)) {
                                        if (backoff.hasNext()) {
                                            logger.info("could not get token document [{}] for refresh, retrying", tokenDoc.id());
                                            client.threadPool()
                                                .schedule(
                                                    () -> getTokenDocAsync(tokenDoc.id(), refreshedTokenIndex, true, this),
                                                    backoff.next(),
                                                    GENERIC
                                                );
                                        } else {
                                            logger.warn("could not get token document [{}] for refresh after all retries", tokenDoc.id());
                                            onFailure.accept(invalidGrantException("could not refresh the requested token"));
                                        }
                                    } else {
                                        onFailure.accept(e);
                                    }
                                }
                            });
                        } else if (isShardNotAvailableException(e)) {
                            if (backoff.hasNext()) {
                                logger.debug("failed to update the original token document [{}], retrying", tokenDoc.id());