### 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
private final String accessToken;
        private final String refreshToken;
        private final Authentication authentication;
        public CreateTokenResult(String accessToken, String refreshToken, Authentication authentication) {
            this.accessToken = accessToken;
            this.refreshToken = refreshToken;
            this.authentication = authentication;
        }
        public String getAccessToken() {
            return accessToken;
        }
        public String getRefreshToken() {
            return refreshToken;
        }
        public Authentication getAuthentication() {
            return authentication;
        }
    }
    private static class KeyComputingRunnable extends AbstractRunnable {
        private final BytesKey decodedSalt;
        private final KeyAndCache keyAndCache;
        private final ActionListener<SecretKey> listener;
        KeyComputingRunnable(BytesKey decodedSalt, KeyAndCache keyAndCache, ActionListener<SecretKey> listener) {