chore: improve integration tests (#8727)

Improve integration tests:
- spliting the tests in TokenExchange to isolated instances and in
parallel
- corrected some test structure so that the check for Details is no done
anymore if the test already failed
- replace required-calls with assert-calls to not stop the testing
- add gofakeit for application, project and usernames(emails)
- add eventually checks for testing in actions v2, so the request only
get called when the execution is defined
- check for length of results in list/search endpoints to avoid index
errors

internal/integration/context.go

@@ -0,0 +1,30 @@
+package integration
+
+import (
+	"context"
+	"time"
+)
+
+// WaitForAndTickWithMaxDuration determine a duration and interval for EventuallyWithT-tests from context timeout and desired max duration
+func WaitForAndTickWithMaxDuration(ctx context.Context, max time.Duration) (time.Duration, time.Duration) {
+	// interval which is used to retry the test
+	tick := time.Millisecond * 100
+	// tolerance which is used to stop the test for the timeout
+	tolerance := tick * 5
+	// default of the WaitFor is always a defined duration, shortened if the context would time out before
+	waitFor := max
+
+	if ctxDeadline, ok := ctx.Deadline(); ok {
+		// if the context has a deadline, set the WaitFor to the shorter duration
+		if until := time.Until(ctxDeadline); until < waitFor {
+			// ignore durations which are smaller than the tolerance
+			if until < tolerance {
+				waitFor = 0
+			} else {
+				// always let the test stop with tolerance before the context is in timeout
+				waitFor = until - tolerance
+			}
+		}
+	}
+	return waitFor, tick
+}