[chore] Remove skip flaky test for tailsamplingprocessor (#23852)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.--> Run 20 times the
GitHub Action on my personal branch, there were no test failures. See
the files:

[Tailsamplingprocessor-FlakyTest-.10205.xlsx](https://github.com/open-telemetry/opentelemetry-collector-contrib/files/11911095/Tailsamplingprocessor-FlakyTest-.10205.xlsx)


**Link to tracking Issue:** <Issue number if applicable>
[10205](#10205)

**Testing:** tailsamplingprocessor/processor_test.go

---------

Co-authored-by: Alex Boten <[email protected]>
Co-authored-by: zeno-splunk <[email protected]>

processor/tailsamplingprocessor/processor_test.go

@@ -61,7 +61,6 @@ func TestSequentialTraceArrival(t *testing.T) {
 }
 
 func TestConcurrentTraceArrival(t *testing.T) {
-	t.Skip("Flaky Test - See https://github.com/open-telemetry/opentelemetry-collector-contrib/issues/10205")
 	traceIds, batches := generateIdsAndBatches(128)
 
 	var wg sync.WaitGroup