Do not send an empty event if no metrics are in the bucket #1002

Job	Run time
Tests (ubuntu-latest, 7.2, lowest)	43s
Tests (ubuntu-latest, 7.2, highest)	28s
Tests (ubuntu-latest, 7.3, lowest)	22s
Tests (ubuntu-latest, 7.3, highest)	52s
Tests (ubuntu-latest, 7.4, lowest)	28s
Tests (ubuntu-latest, 7.4, highest)	44s
Tests (ubuntu-latest, 8.0, lowest)	33s
Tests (ubuntu-latest, 8.0, highest)	47s
Tests (ubuntu-latest, 8.1, lowest)	14s
Tests (ubuntu-latest, 8.1, highest)	51s
Tests (ubuntu-latest, 8.2, lowest)	14s
Tests (ubuntu-latest, 8.2, highest)	49s
Tests (ubuntu-latest, 8.3, lowest)	16s
Tests (ubuntu-latest, 8.3, highest)	53s
Tests (windows-latest, 7.2, lowest)	54s
Tests (windows-latest, 7.2, highest)	54s
Tests (windows-latest, 7.3, lowest)	59s
Tests (windows-latest, 7.3, highest)	1m 25s
Tests (windows-latest, 7.4, lowest)	52s
Tests (windows-latest, 7.4, highest)	1m 24s
Tests (windows-latest, 8.0, lowest)	59s
Tests (windows-latest, 8.0, highest)	1m 42s
Tests (windows-latest, 8.1, lowest)	58s
Tests (windows-latest, 8.1, highest)	1m 43s
Tests (windows-latest, 8.2, lowest)	52s
Tests (windows-latest, 8.2, highest)	1m 35s
Tests (windows-latest, 8.3, lowest)	38s
Tests (windows-latest, 8.3, highest)	1m 16s
	24m 25s

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