Remove unnecessary temp dir access (#123314) (#123332)

All modules have read/write access to the temp dir. This commit removes
unnecessarily adding the temp dir explicitly to the server policy.

Author: rjernst

libs/entitlement/src/main/java/org/elasticsearch/entitlement/initialization/EntitlementInitialization.java

@@ -176,7 +176,6 @@ private static PolicyManager createPolicyManager() {
                     new FilesEntitlement(
                         List.of(
                             // Base ES directories
-                            FileData.ofPath(bootstrapArgs.tempDir(), READ_WRITE),
                             FileData.ofPath(bootstrapArgs.configDir(), READ),
                             FileData.ofPath(bootstrapArgs.logsDir(), READ_WRITE),
                             FileData.ofRelativePath(Path.of(""), DATA, READ_WRITE),
@@ -211,11 +210,7 @@ private static PolicyManager createPolicyManager() {
                     new LoadNativeLibrariesEntitlement(),
                     new ManageThreadsEntitlement(),
                     new FilesEntitlement(
-                        List.of(
-                            FileData.ofPath(bootstrapArgs.configDir(), READ),
-                            FileData.ofPath(bootstrapArgs.tempDir(), READ),
-                            FileData.ofRelativePath(Path.of(""), DATA, READ_WRITE)
-                        )
+                        List.of(FileData.ofPath(bootstrapArgs.configDir(), READ), FileData.ofRelativePath(Path.of(""), DATA, READ_WRITE))
                     )
                 )
             ),