Rename the `_views` directories in ITs back to `views` after the FS Router bug is resolved

[taefi]

Describe the bug

We had to rename the frontend/views directories in the following ITs so that FS Router doesn't engage in those projects after the #2188 is merged:

• react-signals
• react-grid-test We should rename these back to ensure FS Router is also working fine in those ITs.

Expected-behavior

To have views directory in React related ITs and verify that the FS Router is working in those IT apps properly.

Reproduction

N/A

System Info

N/A

[taefi]

The part related to react-grid-test is already done in #2188.