test(wait): use RunAndReturn for dynamic mock in MultipleChecks test

Replace Return(func...) with RunAndReturn(func...) in
TestExecStrategyWaitUntilReady_MultipleChecks. With Return, the function
is returned as the value rather than being invoked on each call.
RunAndReturn ensures the mock executes the function dynamically,
which is the correct pattern for time-dependent behavior.

Signed-off-by: Mateen Anjum <mateenali66@gmail.com>

Author: mateenali66

wait/exec_test.go

@@ -66,7 +66,7 @@ func TestExecStrategyWaitUntilReadyForExec(t *testing.T) {
 func TestExecStrategyWaitUntilReady_MultipleChecks(t *testing.T) {
 	successAfter := time.Now().Add(2 * time.Second)
 	target := newMockStrategyTarget(t)
-	target.On("Exec", mock.Anything, mock.Anything, mock.Anything).Return(
+	target.On("Exec", mock.Anything, mock.Anything, mock.Anything).RunAndReturn(
 		func(ctx context.Context, cmd []string, opts ...tcexec.ProcessOption) (int, io.Reader, error) {
 			if time.Now().After(successAfter) {
 				return 0, nil, nil