ccl/multiregionccl: unskip test multi region dd parent test

`TestMultiRegionDataDriven` was skipped in cockroachdb#108107 due to finish
(tracing span) being called twice in raft reproposals cockroachdb#107521, which
 cockroachdb#108775 fixed.

Unskip the top level `TestMultiRegionDataDriven` test. Note
`/secondary_region` is still skipped due to a known allocator bug.

Informs: cockroachdb#98020
Epic: none
Release note: None

pkg/ccl/multiregionccl/datadriven_test.go

@@ -120,7 +120,6 @@ func TestMultiRegionDataDriven(t *testing.T) {
 	// (legitimate) timing issues on a deadlock build.
 	skip.UnderRace(t, "flaky test")
 	skip.UnderDeadlock(t, "flaky test")
-	skip.WithIssue(t, 98020)
 	ctx := context.Background()
 	datadriven.Walk(t, datapathutils.TestDataPath(t), func(t *testing.T, path string) {
 		ds := datadrivenTestState{}