SAI Action set corpse delay uses wrong timeunit

**Describe the bug**
SAI Action set corpse delay uses wrong unit. It uses milliseconds while its seconds in tc.

**Version (commit hash)**
bb4e96d7b771f9d47ea997c579310d95956d227c

**To Reproduce**
Steps to reproduce the behavior:
1. Create any corpse delay action

**Expected behavior**
Should be seconds instead of ms

**Screenshots**

No file or test is named. Locate the SAI Action set corpse delay handling, compare the value's unit with the seconds expected by tc, and verify that creating a corpse delay action passes seconds rather than milliseconds.

Written by the indexing model from the issue text.