[NFC][UBSAN] Fix minimal UBSAN test names (#137244)
Same approach as in Asan.
Now it's going to print:
```
Failed Tests (2):
UBSan-Minimal-i386-linux :: TestCases/icall.c
UBSan-Minimal-x86_64-linux :: TestCases/icall.c
```
Before it was:
```
Failed Tests (2):
UBSan-Minimal-x86_64 :: TestCases/icall.c
UBSan-Minimal-x86_64 :: TestCases/icall.c
```
