### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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
/**
     * Performs the actual invalidation of a collection of api keys
     *
     * @param apiKeyIds the api keys to invalidate
     * @param listener  the listener to notify upon completion
     */
    private void indexInvalidation(Collection<String> apiKeyIds, ActionListener<InvalidateApiKeyResponse> listener) {
        maybeStartApiKeyRemover();
        if (apiKeyIds.isEmpty()) {
            listener.onFailure(new ElasticsearchSecurityException("No api key ids provided for invalidation"));
        } else {
            BulkRequestBuilder bulkRequestBuilder = client.prepareBulk();
            final long invalidationTime = clock.instant().toEpochMilli();
            for (String apiKeyId : apiKeyIds) {
                UpdateRequest request = client.prepareUpdate(SECURITY_MAIN_ALIAS, apiKeyId)
                    .setDoc(Map.of("api_key_invalidated", true, "invalidation_time", invalidationTime))
                    .request();
                bulkRequestBuilder.add(request);
            }
            bulkRequestBuilder.setRefreshPolicy(RefreshPolicy.WAIT_UNTIL);
            securityIndex.prepareIndexIfNeededThenExecute(
                ex -> listener.onFailure(traceLog("prepare security index", ex)),
                () -> executeAsyncWithOrigin(
                    client.threadPool().getThreadContext(),
                    SECURITY_ORIGIN,
                    bulkRequestBuilder.request(),
                    ActionListener.<BulkResponse>wrap(bulkResponse -> {
                        ArrayList<ElasticsearchException> failedRequestResponses = new ArrayList<>();
                        ArrayList<String> previouslyInvalidated = new ArrayList<>();
                        ArrayList<String> invalidated = new ArrayList<>();