Implement OpenTofu language block and required version.

Implement OpenTofu language block and required version.: a task in LoLBench (Harbor dataset). You are working in /workspace/opentofu , a source tree checked out at the base commit for this task. Implement the requested behavior in the source tree, then run:

The task

You are working in `/workspace/opentofu`, a source tree checked out at the base commit for this task. Implement the requested behavior in the source tree, then run:

Part of lolbench26/LoLBench.