### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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
XContentType.JSON
            )
        );
        assertEquals("api_key", apiKeyDoc.docType);
        assertEquals(1591919944598L, apiKeyDoc.creationTime);
        assertEquals(1591919944599L, apiKeyDoc.expirationTime);
        assertFalse(apiKeyDoc.invalidated);
        assertEquals("{PBKDF2}10000$abc", apiKeyDoc.hash);
        assertEquals("key-1", apiKeyDoc.name);
        assertEquals(7000099, apiKeyDoc.version);
        assertEquals(new BytesArray("""
            {"a":{"cluster":["all"]}}"""), apiKeyDoc.roleDescriptorsBytes);
        assertEquals(new BytesArray("""
            {"limited_by":{"cluster":["all"],"metadata":{"_reserved":true},"type":"role"}}"""), apiKeyDoc.limitedByRoleDescriptorsBytes);
        final Map<String, Object> creator = apiKeyDoc.creator;
        assertEquals("admin", creator.get("principal"));
        assertEquals("file1", creator.get("realm"));
        assertEquals("file", creator.get("realm_type"));
        assertEquals("bar", ((Map<String, Object>) creator.get("metadata")).get("foo"));
    }
    public void testValidateApiKeyDocBeforeUpdate() throws IOException {
        final var apiKeyId = randomAlphaOfLength(12);
        final var apiKey = randomAlphaOfLength(16);
        final var hasher = getFastStoredHashAlgoForTests();
        final char[] hash = hasher.hash(new SecureString(apiKey.toCharArray()));
        final var apiKeyService = createApiKeyService();
        final var apiKeyDocWithNullName = buildApiKeyDoc(hash, -1, false, null, Version.V_8_2_0.id);
        final var auth = Authentication.newRealmAuthentication(
            new User("test_user", "role"),
            new Authentication.RealmRef("realm1", "realm_type1", "node")