don't show number of occurrences for contains.inAnyOrder.atLeast(1)

[robstoll]

Platform (jvm, js, android): all
Extension (none, kotlin 1.3, jdk8): none

Code related feature

Based on discussion in robstoll/atrium-roadmap#56
We would like to see

◆ contains, in any order: 
  ⚬ an element which:
      »  is less than: 0        (kotlin.Int <1234789>)
        » but no such element was found.

---

Instead of:

◆ contains, in any order: 
  ⚬ an entry which: 
      » is less than: 0        (kotlin.Int <1234789>)
    ⚬ ▶ number of occurrences: 0
        ◾ is at least: 1

This change shall not affect cases like atLeast(2) or exactly(1)

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[robstoll]

@susmithasrimani this isn't an easy one to start with, I suggest you do a good first issue first.