[bugfix] Make rerun prompt consistent with the new naming scheme

[ekouts]

Closes #2464 .

One small thing that I realized in this PR is that if we define a test like this:

class X_foo(rfm.RunOnlyRegressionTest):
    a = parameter(['a', 'b', 'c'])
    ...

we can rerun it with -n X@foo@1 when compact_test_names=True, because of this code https://github.com/eth-cscs/reframe/blob/master/reframe/frontend/filters.py#L29 . Should I leave it as it is or do we want to change the bahaviour there as well?

[codecov-commenter]

Codecov Report

Merging #2471 (8ea201a) into master (8aed4f5) will decrease coverage by 0.02%.
The diff coverage is 50.00%.

❗ Current head 8ea201a differs from pull request most recent head 36ab789. Consider uploading reports for the commit 36ab789 to get more accurate results

@@            Coverage Diff             @@
##           master    #2471      +/-   ##
==========================================
- Coverage   85.71%   85.69%   -0.03%     
==========================================
  Files          56       56              
  Lines       10529    10534       +5     
==========================================
+ Hits         9025     9027       +2     
- Misses       1504     1507       +3     

Impacted Files	Coverage Δ
reframe/frontend/statistics.py	94.63% <50.00%> (-1.37%)	⬇️

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