Release fix pinning slow-tests.json (#121746)
Apply release changes script adds version to SLOW_TESTS_FILE which should not change
Test:
```
SLOW_VER=test
sed -i -e s#/slow-tests.json#"/slow-tests.json?versionId=${SLOW_VER}"# tools/stats/import_test_stats.py
```
Output:
```
SLOW_TESTS_FILE = ".pytorch-slow-tests.json"
...
url = "https://ossci-metrics.s3.amazonaws.com/slow-tests.json?versionId=test"
```
related to: https://github.com/pytorch/pytorch/pull/121726
Pull Request resolved: https://github.com/pytorch/pytorch/pull/121746
Approved by: https://github.com/huydhn
