Fix MapperSizeClientYamlTestSuiteIT when FIPS is enabled (#93357) (#93365)

The issue with this test failure is actually that we were silently
failing to install the plugin under test into the cluster. The root
cause here was the FIPS security policy file was not copied into cluster
config directory before we attempting to run the plugin installer. Since
we pass the FIPS JVM arguments to all CLI tools as well this caused
plugin installation to fail. We now ensure that these files are copied
before we attempt to run _any_ ES tools.

Closes #93303

Author: mark-vieira

plugins/mapper-size/src/yamlRestTest/resources/rest-api-spec/test/mapper_size/10_basic.yml

@@ -4,10 +4,6 @@
 ---
 "Mapper Size":
 
-    - skip:
-        version: "all"
-        reason: "AwaitsFix https://github.com/elastic/elasticsearch/issues/93303"
-
     - do:
         indices.create:
             index: test

test/test-clusters/src/main/java/org/elasticsearch/test/cluster/local/LocalClusterFactory.java

@@ -107,22 +107,20 @@ public synchronized void start() {
                 distributionDescriptor = resolveDistribution();
                 LOGGER.info("Distribution for node '{}': {}", spec.getName(), distributionDescriptor);
                 initializeWorkingDirectory();
+                createConfigDirectory();
+                copyExtraConfigFiles(); // extra config files might be needed for running cli tools like plugin install
                 copyExtraJarFiles();
                 installPlugins();
                 if (spec.getDistributionType() == DistributionType.INTEG_TEST) {
                     installModules();
                 }
                 initialized = true;
+            } else {
+                createConfigDirectory();
+                copyExtraConfigFiles();
             }
 
-            try {
-                IOUtils.deleteWithRetry(configDir);
-                Files.createDirectories(configDir);
-            } catch (IOException e) {
-                throw new UncheckedIOException("An error occurred creating config directory", e);
-            }
             writeConfiguration();
-            copyExtraConfigFiles();
             createKeystore();
             addKeystoreSettings();
             configureSecurity();
@@ -188,6 +186,15 @@ public void waitUntilReady() {
             }
         }
 
+        private void createConfigDirectory() {
+            try {
+                IOUtils.deleteWithRetry(configDir);
+                Files.createDirectories(configDir);
+            } catch (IOException e) {
+                throw new UncheckedIOException("An error occurred creating config directory", e);
+            }
+        }
+
         private List<String> readPortsFile(Path file) {
             try (Stream<String> lines = Files.lines(file, StandardCharsets.UTF_8)) {
                 return lines.map(String::trim).collect(Collectors.toList());