### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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/test/java/org/elasticsearch/xpack/security/authc/ApiKeyServiceTests.java
final String apiKeyId = randomAlphaOfLength(20);
        final var searchHit = new SearchHit(docId, apiKeyId);
        try (XContentBuilder builder = JsonXContent.contentBuilder()) {
            builder.map(XContentHelper.convertToMap(JsonXContent.jsonXContent, Strings.format("""
                {
                  "doc_type": "api_key",
                  "type": "cross_cluster",
                  "creation_time": 1591919944598,
                  "expiration_time": null,
                  "api_key_invalidated": false,
                  "api_key_hash": "{PBKDF2}10000$abc",
                  "role_descriptors": { "cross_cluster": %s },
                  "limited_by_role_descriptors": { },
                  "name": null,
                  "version": 8090099,
                  "creator": {
                    "principal": "admin",
                    "metadata": {},
                    "realm": "file1"
                  }
                }""", roleDescriptor), randomBoolean()));
            searchHit.sourceRef(BytesReference.bytes(builder));
            return searchHit;
        } catch (IOException e) {
            throw new UncheckedIOException(e);
        }
    }
    public void testCrossClusterApiKeyUsageStatsAreZerosWhenServiceNotEnabled() {
        final Settings settings = Settings.builder().put(XPackSettings.API_KEY_SERVICE_ENABLED_SETTING.getKey(), false).build();
        final ApiKeyService service = createApiKeyService(settings);