### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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 var apiKeyDoc1 = buildApiKeyDoc(
            hash,
            randomFrom(-1L, futureTime),
            false,
            randomAlphaOfLengthBetween(3, 8),
            Version.CURRENT.id
        );
        final ApiKey.Type expectedType1 = randomValueOtherThan(apiKeyDoc1.type, () -> randomFrom(ApiKey.Type.values()));
        final ApiKeyCredentials apiKeyCredentials1 = getApiKeyCredentials(apiKeyId, apiKey, expectedType1);
        final PlainActionFuture<AuthenticationResult<User>> future1 = new PlainActionFuture<>();
        ApiKeyService.validateApiKeyTypeAndExpiration(apiKeyDoc1, apiKeyCredentials1, clock, future1);
        final AuthenticationResult<User> auth1 = future1.actionGet();
        assertThat(auth1.getStatus(), is(AuthenticationResult.Status.TERMINATE));
        assertThat(auth1.getValue(), nullValue());
        assertThat(
            auth1.getMessage(),
            containsString(
                "authentication expected API key type of ["
                    + expectedType1.value()
                    + "], but API key ["
                    + apiKeyId
                    + "] has type ["
                    + apiKeyDoc1.type.value()
                    + "]"
            )
        );
        
        final var apiKeyDoc2 = buildApiKeyDoc(hash, pastTime, false, randomAlphaOfLengthBetween(3, 8), Version.CURRENT.id);
        final ApiKeyCredentials apiKeyCredentials2 = getApiKeyCredentials(apiKeyId, apiKey, apiKeyDoc2.type);
        final PlainActionFuture<AuthenticationResult<User>> future2 = new PlainActionFuture<>();