instance.gen task: make example instance name less confusing

See !2245 (comment 52217)
9 jobs for feat/instance-gen-improvements in 3 minutes and 39 seconds (queued for 3 seconds)
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passed #97797
build

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  Test
passed #97802
analysis

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passed #97799
federated-testing

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passed #97801
lint

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passed #97798
unit-testing

00:02:55

87.8%
passed #97800
unit-testing-rum

00:02:30

 
  Benchmark
manual #97803
allowed to fail manual
benchmark
 
  Deploy
manual #97804
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review_app
manual #97805
allowed to fail manual
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