### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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
assertThat(e.getMessage(), containsString("authentication realm must be [_es_api_key]"));
    }
    public void testMaybeRemoveRemoteIndicesPrivilegesWithUnsupportedVersion() {
        final String apiKeyId = randomAlphaOfLengthBetween(5, 8);
        final Set<RoleDescriptor> userRoleDescriptors = Set.copyOf(
            randomList(2, 5, () -> RoleDescriptorTests.randomRoleDescriptor(randomBoolean(), randomBoolean(), randomBoolean()))
        );
        
        final TransportVersion minTransportVersion = TransportVersionUtils.randomVersionBetween(
            random(),
            TransportVersion.MINIMUM_COMPATIBLE,
            TransportVersionUtils.getPreviousVersion(TRANSPORT_VERSION_ADVANCED_REMOTE_CLUSTER_SECURITY_CCS)
        );
        final Set<RoleDescriptor> result = ApiKeyService.maybeRemoveRemoteIndicesPrivileges(
            userRoleDescriptors,
            minTransportVersion,
            apiKeyId
        );
        assertThat(result.stream().anyMatch(RoleDescriptor::hasRemoteIndicesPrivileges), equalTo(false));
        assertThat(result.size(), equalTo(userRoleDescriptors.size()));
        
        final List<String> userRoleNamesWithRemoteIndicesPrivileges = userRoleDescriptors.stream()
            .filter(RoleDescriptor::hasRemoteIndicesPrivileges)
            .map(RoleDescriptor::getName)
            .sorted()
            .toList();
        if (false == userRoleNamesWithRemoteIndicesPrivileges.isEmpty()) {
            assertWarnings(
                "Removed API key's remote indices privileges from role(s) "
                    + userRoleNamesWithRemoteIndicesPrivileges