### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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
RoleReference.ApiKeyRoleType roleType
    ) {
        if (roleDescriptorsMap == null) {
            return null;
        }
        final List<RoleDescriptor> roleDescriptors = roleDescriptorsMap.entrySet().stream().map(entry -> {
            final String name = entry.getKey();
            @SuppressWarnings("unchecked")
            final Map<String, Object> rdMap = (Map<String, Object>) entry.getValue();
            try (XContentBuilder builder = XContentBuilder.builder(XContentType.JSON.xContent())) {
                builder.map(rdMap);
                try (
                    XContentParser parser = XContentType.JSON.xContent()
                        .createParser(
                            XContentParserConfiguration.EMPTY.withDeprecationHandler(
                                new ApiKeyLoggingDeprecationHandler(deprecationLogger, apiKeyId)
                            ),
                            BytesReference.bytes(builder).streamInput()
                        )
                ) {
                    return RoleDescriptor.parse(name, parser, false);
                }
            } catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        }).toList();
        return roleType == RoleReference.ApiKeyRoleType.LIMITED_BY
            ? maybeReplaceSuperuserRoleDescriptor(apiKeyId, roleDescriptors)
            : roleDescriptors;
    }