Fix #3501 (VLLM): TypeError: top_k must be an integer, got float

[surak]

trafficstars

VLLM needs top_j to be int, not float

Why are these changes needed?

For VLLM to work again

Related issue number (if applicable)

Closes #3501

Checks

• [x] I've run format.sh to lint the changes in this PR.
• [x] I've included any doc changes needed.
• [ x I've made sure the relevant tests are passing (if applicable).