[Test] Remove API key methods from HLRC (#85802)

The High Level Rest Client (HLRC) is deprecated and is no longer
shipped as a standalone artifact.
It can now be safely removed from the ES codebase.

This commit removes all API key methods from the HLRC
SecurityClient, along with their associated Request/Response
classes.

Test code that depended on these methods has been migrated
to use TestSecurityClient instead.

Relates: #83423

client/rest-high-level/src/main/java/org/elasticsearch/client/SecurityClient.java

@@ -12,10 +12,6 @@
 import org.elasticsearch.client.security.ClearRealmCacheResponse;
 import org.elasticsearch.client.security.DelegatePkiAuthenticationRequest;
 import org.elasticsearch.client.security.DelegatePkiAuthenticationResponse;
-import org.elasticsearch.client.security.GetApiKeyRequest;
-import org.elasticsearch.client.security.GetApiKeyResponse;
-import org.elasticsearch.client.security.InvalidateApiKeyRequest;
-import org.elasticsearch.client.security.InvalidateApiKeyResponse;
 
 import java.io.IOException;
 
@@ -60,47 +56,6 @@ public ClearRealmCacheResponse clearRealmCache(ClearRealmCacheRequest request, R
         );
     }
 
-    /**
-     * Retrieve API Key(s) information.<br>
-     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-get-api-key.html">
-     * the docs</a> for more.
-     *
-     * @param request the request to retrieve API key(s)
-     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
-     * @return the response from the get API key call
-     * @throws IOException in case there is a problem sending the request or parsing back the response
-     */
-    public GetApiKeyResponse getApiKey(final GetApiKeyRequest request, final RequestOptions options) throws IOException {
-        return restHighLevelClient.performRequestAndParseEntity(
-            request,
-            SecurityRequestConverters::getApiKey,
-            options,
-            GetApiKeyResponse::fromXContent,
-            emptySet()
-        );
-    }
-
-    /**
-     * Invalidate API Key(s).<br>
-     * See <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/security-api-invalidate-api-key.html">
-     * the docs</a> for more.
-     *
-     * @param request the request to invalidate API key(s)
-     * @param options the request options (e.g. headers), use {@link RequestOptions#DEFAULT} if nothing needs to be customized
-     * @return the response from the invalidate API key call
-     * @throws IOException in case there is a problem sending the request or parsing back the response
-     */
-    public InvalidateApiKeyResponse invalidateApiKey(final InvalidateApiKeyRequest request, final RequestOptions options)
-        throws IOException {
-        return restHighLevelClient.performRequestAndParseEntity(
-            request,
-            SecurityRequestConverters::invalidateApiKey,
-            options,
-            InvalidateApiKeyResponse::fromXContent,
-            emptySet()
-        );
-    }
-
     /**
      * Get an Elasticsearch access token from an {@code X509Certificate} chain. The certificate chain is that of the client from a mutually
      * authenticated TLS session, and it is validated by the PKI realms with {@code delegation.enabled} toggled to {@code true}.<br>

client/rest-high-level/src/main/java/org/elasticsearch/client/SecurityRequestConverters.java

@@ -8,13 +8,9 @@
 
 package org.elasticsearch.client;
 
-import org.apache.http.client.methods.HttpDelete;
-import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.elasticsearch.client.security.ClearRealmCacheRequest;
 import org.elasticsearch.client.security.DelegatePkiAuthenticationRequest;
-import org.elasticsearch.client.security.GetApiKeyRequest;
-import org.elasticsearch.client.security.InvalidateApiKeyRequest;
 import org.elasticsearch.common.Strings;
 
 import java.io.IOException;
@@ -49,28 +45,4 @@ static Request delegatePkiAuthentication(DelegatePkiAuthenticationRequest delega
         return request;
     }
 
-    static Request getApiKey(final GetApiKeyRequest getApiKeyRequest) throws IOException {
-        final Request request = new Request(HttpGet.METHOD_NAME, "/_security/api_key");
-        if (Strings.hasText(getApiKeyRequest.getId())) {
-            request.addParameter("id", getApiKeyRequest.getId());
-        }
-        if (Strings.hasText(getApiKeyRequest.getName())) {
-            request.addParameter("name", getApiKeyRequest.getName());
-        }
-        if (Strings.hasText(getApiKeyRequest.getUserName())) {
-            request.addParameter("username", getApiKeyRequest.getUserName());
-        }
-        if (Strings.hasText(getApiKeyRequest.getRealmName())) {
-            request.addParameter("realm_name", getApiKeyRequest.getRealmName());
-        }
-        request.addParameter("owner", Boolean.toString(getApiKeyRequest.ownedByAuthenticatedUser()));
-        return request;
-    }
-
-    static Request invalidateApiKey(final InvalidateApiKeyRequest invalidateApiKeyRequest) throws IOException {
-        final Request request = new Request(HttpDelete.METHOD_NAME, "/_security/api_key");
-        request.setEntity(createEntity(invalidateApiKeyRequest, REQUEST_BODY_CONTENT_TYPE));
-        return request;
-    }
-
 }