### Description

The [Get API key information API](https://www.elastic.co/guide/en/elasticsearch/reference/master/security-api-get-api-key.html) can currently filter the returned keys by:
 * key id/name
 * keys owned by the calling user
 * keys owned by other users, by `realm_name` and `username`

Irrespective of the filtering used, both invalidated and expired (but not yet deleted) keys will be included in the response.
In the response, keys have the `invalidated` boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.

I propose we introduce a way for the API to support retrieving:
* only valid API keys (not return invalidated keys) - using a boolean request parameter
* keys not expired before a certain timestamp - using a timestamp parameter that defaults to "now" - also note that keys' experiation date is always checked against the local node's clock
x-pack/plugin/security/src/main/java/org/elasticsearch/xpack/security/authc/ApiKeyService.java
* Invalidate API keys for given realm, user name, API key name and id.
     * @param realmNames realm names
     * @param username user name
     * @param apiKeyName API key name
     * @param apiKeyIds API key ids
     * @param invalidateListener listener for {@link InvalidateApiKeyResponse}
     */
    public void invalidateApiKeys(
        String[] realmNames,
        String username,
        String apiKeyName,
        String[] apiKeyIds,
        ActionListener<InvalidateApiKeyResponse> invalidateListener
    ) {
        ensureEnabled();
        if ((realmNames == null || realmNames.length == 0)
            && Strings.hasText(username) == false
            && Strings.hasText(apiKeyName) == false
            && (apiKeyIds == null || apiKeyIds.length == 0)) {
            logger.trace("none of the parameters [api key id, api key name, username, realm name] were specified for invalidation");
            invalidateListener.onFailure(
                new IllegalArgumentException("One of [api key id, api key name, username, realm name] must be specified")
            );
        } else {
            findApiKeysForUserRealmApiKeyIdAndNameCombination(
                realmNames,
                username,
                apiKeyName,
                apiKeyIds,
                true,