Adopt MLIR properties for attribute storage in Flang (NFC)

[mehdi_amini]

Summary

MLIR is deprecating the old behavior in LLVM 18.

[clementval]

LGTM.

flang/include/flang/Optimizer/CodeGen/CGOps.td

 #define FORTRAN_DIALECT_FIRCG_OPS
 
 include "mlir/IR/SymbolInterfaces.td"
 include "flang/Optimizer/Dialect/FIRTypes.td"
 
 def fircg_Dialect : Dialect {
   let name = "fircg";
   let cppNamespace = "::fir::cg";
+  let usePropertiesForAttributes = 1;
 }
 
 // Base class for FIR CG operations.
 // All operations automatically get a prefix of "fircg.".
 class fircg_Op<string mnemonic, list<Trait> traits>
   : Op<fircg_Dialect, mnemonic, traits>;
 
 // Extended embox operation.

flang/include/flang/Optimizer/Dialect/FIRDialect.td

 include "mlir/Interfaces/LoopLikeInterface.td"
 include "mlir/Interfaces/SideEffectInterfaces.td"
 
 def fir_Dialect : Dialect {
   let name = "fir";
   let cppNamespace = "::fir";
   let useDefaultTypePrinterParser = 0;
   let useDefaultAttributePrinterParser = 0;
+  let usePropertiesForAttributes = 1;
   let dependentDialects = [
     // Arith dialect provides FastMathFlagsAttr
     // supported by some FIR operations.
     "arith::ArithDialect"
   ];
 }
 
 #endif // FORTRAN_DIALECT_FIR_DIALECT

flang/include/flang/Optimizer/HLFIR/HLFIROpBase.td

let description = [{
     level operations, FIR should be used directly.
 
     A bufferization pass transforms hlfir.expr values into FIR temporary in
     memory, and its translation pass to FIR translates high level operations
     into sequence of lower level FIR operations operating on memory.
   }];
 
   let useDefaultTypePrinterParser = 1;
+  let usePropertiesForAttributes = 1;
   let cppNamespace = "hlfir";
   let dependentDialects = ["fir::FIROpsDialect"];
 }
 
 
 def hlfir_ExprType : TypeDef<hlfir_Dialect, "Expr"> {
   let mnemonic = "expr";
   let summary = "The type of an array, character, or derived type Fortran expression";