Find runfiles when a binary is executed from PATH (#4426)

**What type of PR is this?**

Feature

**What does this PR do? Why is it needed?**

**Which issues(s) does this PR fix?**

**Other notes for review**


https://bazelbuild.slack.com/archives/CDBP88Z0D/p1751654245992999?thread_ts=1751654245.992999&cid=CDBP88Z0D
1 file changed