Revert "apacheGH-37848: [C++][Gandiva] Migrate LLVM JIT engine from MCJIT to ORC v2/LLJIT (apache#39098)"

This reverts commit 83cba25.

Author: lriggs

cpp/cmake_modules/FindLLVMAlt.cmake

@@ -93,8 +93,8 @@ if(LLVM_FOUND)
         debuginfodwarf
         ipo
         linker
+        mcjit
         native
-        orcjit
         target)
     if(LLVM_VERSION_MAJOR GREATER_EQUAL 14)
       list(APPEND LLVM_TARGET_COMPONENTS passes)

cpp/src/gandiva/configuration.h

@@ -37,12 +37,10 @@ class GANDIVA_EXPORT Configuration {
 
   explicit Configuration(bool optimize,
                          std::shared_ptr<FunctionRegistry> function_registry =
-                             gandiva::default_function_registry(),
-                         bool dump_ir = false)
+                             gandiva::default_function_registry())
       : optimize_(optimize),
         target_host_cpu_(true),
-        function_registry_(std::move(function_registry)),
-        dump_ir_(dump_ir) {}
+        function_registry_(function_registry) {}
 
   Configuration() : Configuration(true) {}
 
@@ -52,13 +50,11 @@ class GANDIVA_EXPORT Configuration {
 
   bool optimize() const { return optimize_; }
   bool target_host_cpu() const { return target_host_cpu_; }
-  bool dump_ir() const { return dump_ir_; }
   std::shared_ptr<FunctionRegistry> function_registry() const {
     return function_registry_;
   }
 
   void set_optimize(bool optimize) { optimize_ = optimize; }
-  void set_dump_ir(bool dump_ir) { dump_ir_ = dump_ir; }
   void target_host_cpu(bool target_host_cpu) { target_host_cpu_ = target_host_cpu; }
   void set_function_registry(std::shared_ptr<FunctionRegistry> function_registry) {
     function_registry_ = std::move(function_registry);
@@ -69,9 +65,6 @@ class GANDIVA_EXPORT Configuration {
   bool target_host_cpu_; /* set the mcpu flag to host cpu while compiling llvm ir */
   std::shared_ptr<FunctionRegistry>
       function_registry_; /* function registry that may contain external functions */
-  // flag indicating if IR dumping is needed, defaults to false, and turning it on will
-  // negatively affect performance
-  bool dump_ir_ = false;
 };
 
 /// \brief configuration builder for gandiva
@@ -90,12 +83,6 @@ class GANDIVA_EXPORT ConfigurationBuilder {
     return configuration;
   }
 
-  std::shared_ptr<Configuration> build_with_ir_dumping(bool dump_ir) {
-    std::shared_ptr<Configuration> configuration(
-        new Configuration(true, gandiva::default_function_registry(), dump_ir));
-    return configuration;
-  }
-
   std::shared_ptr<Configuration> build(
       std::shared_ptr<FunctionRegistry> function_registry) {
     std::shared_ptr<Configuration> configuration(