mir-opt: Make SimplifyCfg collapse goto chains starting from bb0 #56764
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mir-opt: Make SimplifyCfg collapse goto chains starting from bb0
`SimplifyCfg` pass was not able to collapse goto chains starting from bb0, leaving MIR like this:
```
bb0: {
goto -> bb1;
}
```
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☀️ Test successful - status-appveyor, status-travis |
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SimplifyCfgpass was not able to collapse goto chains starting from bb0, leaving MIR like this: