[JS] we should not use `src/rest/parameters.ts` as some logical judgment criteria in js release tool

for hlc, modular and rlc, all these will not generate the src/rest/parameters.ts any more, so we should improve related codes to fix some failure like `Failed to generate SDK for package '@azure/ai-agents' due to Error: File not found: /mnt/vss/_work/1/s/azure-sdk-for-js/sdk/ai/ai-agents/src/rest/parameters.ts`

another failure found in https://dev.azure.com/azure-sdk/internal/_build/results?buildId=5353286&view=results

Start by locating the JavaScript release-tool logic that treats src/rest/parameters.ts as a required criterion, then compare it with the HLC, modular, and RLC generation paths described here. Use the linked Azure DevOps build failure as a reproduction reference. Done means SDK generation no longer fails when that file is absent for these package types.

Written by the indexing model from the issue text.