Incorrect Success rate Calculation deducting Skipped Scenario

**Describe the bug**
Incorrect Success rate Calculation deducting Skipped Scenario

it seems allure calculates the success rate = (SucceededScenario / (TotalScenario -SkippedScenario))

**To Reproduce**
Run for example 8 tests and put 6 of them as skipped and the results should be 100% on success rate but I got 20%

**Expected behavior**
success rate = (SucceededScenario / TotalScenario)
it it doesn't fit everybody an option should be considered to take into account SkippedScenario in the calculation or not.

**Screenshots**


**Desktop (please complete the following information):**
chrome and the latest version

**Additional context**
In my opinion should be an option if you want to count or not the skipped tests

No source files or tests are named. Reproduce the report with 8 tests, including 6 skipped scenarios, then locate the success-rate calculation and compare it with the stated expected formula. Done means the displayed rate follows the chosen skipped-scenario behavior, including any supported option.

Written by the indexing model from the issue text.