[llvm] [llvm-cxxfilt] Added the option --no-params (PR #75348)

[Dmitry Vasilyev via llvm-commits]

slydiman wrote:

> note the parentheses at the end in the thing you've implemented, whereas these are not present in the GNU output.

Note `NodeArray Params` is required parameter for the class FunctionEncoding. All other parts are `const Node *` and may be nullptr. We can update Params type to `const NodeArray *` and update the printing logic in FunctionEncoding::printRight() like
```
if (Params) {
  OB.printOpen();
  Params->printWithComma(OB);
  OB.printClose();
}
```
But I think it is redundant. It requires to review all FunctionEncoding::getParams() usage too.

https://github.com/llvm/llvm-project/pull/75348