…nd cast the relevant use cases

Adding template for function `generateS390CompareAndBranchInstruction` and initialize it to pass in int32_t or int64_t type only for the parameter `second`.Also, cast the type of the parameter to either int32_t or int64_t in the use cases if needed.

Adding a new signiture to have it pass in `TR::RealRegister *` type for parameter `second`, and casting it to `TR::Register *` type to use the relevant function.

Signed-off-by: simonameng <simonameng97@gmail.com>

…hInstruction`

Delete the `TR::RealRegister` version of `generateS390CompareAndBranchInstruction` since alreay typecasted the relevant argument to `TR::Register` from `TR::RealRegister`.

Signed-off-by: simonameng <simonameng97@gmail.com>

For the use cases with op code `TR::InstOpCode::CL`, treat the immediate value as `int32_t` type. And for the use cases with op code `TR::InstOpCode::CLG`, treat the immediate value as `int64_t` type.

Signed-off-by: simonameng <simonameng97@gmail.com>