### 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boolean property, as well as the `expiration` property that contains the UNIX timestamp past of which the key is no longer valid for authentication.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
return ReservedRolesStore.SUPERUSER_ROLE_DESCRIPTOR;
            }
            return rd;
        }).toList();
    }
    /**
     * Validates the ApiKey using the source map
     * @param docId the identifier of the document that was retrieved from the security index
     * @param apiKeyDoc the partially deserialized API key document
     * @param credentials the credentials provided by the user
     * @param listener the listener to notify after verification
     */
    void validateApiKeyCredentials(
        String docId,
        ApiKeyDoc apiKeyDoc,
        ApiKeyCredentials credentials,
        Clock clock,
        ActionListener<AuthenticationResult<User>> listener
    ) {
        if ("api_key".equals(apiKeyDoc.docType) == false) {
            listener.onResponse(
                AuthenticationResult.unsuccessful("document [" + docId + "] is [" + apiKeyDoc.docType + "] not an api key", null)
            );
        } else if (apiKeyDoc.invalidated == null) {
            listener.onResponse(AuthenticationResult.unsuccessful("api key document is missing invalidated field", null));
        } else if (apiKeyDoc.invalidated) {
            if (apiKeyAuthCache != null) {
                apiKeyAuthCache.invalidate(docId);
            }
            listener.onResponse(AuthenticationResult.unsuccessful("api key [" + credentials.getId() + "] has been invalidated", null));