test(cli/self-upd): use direct arg0 override for as_rustup_setup()#4929
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djc
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Jun 30, 2026
This prevents a random error on Linux when running the test on CI.
Sometimes, even after `fs::copy()` has returned, the executable is still
considered "busy" by the OS, causing the test to fail with:
```rust
Os { code: 26, kind: ExecutableFileBusy, message: "Text file busy" }
```
This change avoids that by using a direct arg0 override instead.
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This prevents a random error on Linux when running the test on CI. Sometimes, even after
fs::copy()has returned, the executable is still considered "busy" by the OS, causing the test to fail with:This change avoids that by using a direct arg0 override instead.