iperf: Increase the priority of the report thread

[zkkkk12]

Note: Please adhere to Contributing Guidelines.

Summary

Ensure it is not blocked by the iperf thread, preventing iperf from completing

Impact

This ensures that iperf executes correctly.

Testing

The bandwidth can be measured normally using iperf, which comes with NuttX.
On the device: iperf -s -i 1 -t 10
On the PC: iperf -c 10.0.0.2 -i 1 -t 10
before:

core1> iperf -s -i 1 -t 10
     IP: 10.0.0.2
 mode=tcp-server sip=10.0.0.2:5001,dip=0.0.0.0:5001, interval=1, time=10
accept: 10.0.0.11:50038
           Interval         Transfer         Bandwidth

Printing gets stuck at this point.
Improved：

core1> iperf -s -i 1 -t 10
     IP: 10.0.0.2

 mode=tcp-server sip=10.0.0.2:5001,dip=0.0.0.0:5001, interval=1, time=10
accept: 10.0.0.11:50038

           Interval         Transfer         Bandwidth

   0.00-   1.00 sec    8713788 Bytes   69.69 Mbits/sec
   1.00-   2.00 sec    8717184 Bytes   69.72 Mbits/sec
   2.00-   3.00 sec    8673408 Bytes   69.37 Mbits/sec
   3.00-   4.00 sec    8683776 Bytes   69.43 Mbits/sec
   4.00-   5.00 sec    8688384 Bytes   69.47 Mbits/sec
   5.00-   6.00 sec    8681472 Bytes   69.43 Mbits/sec
iperf exit

[cederom]

Thank you @zkkkk12, this fix is trivial, but we cannot accept PRs with quality below requirements.

Please read carefully https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md and update the PR description.

Please provide plaintext logs, provided image is unreadable and bigger than several lines of text anyways.

[zkkkk12]

Thank you @zkkkk12, this fix is trivial, but we cannot accept PRs with quality below requirements.

Please read carefully https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md and update the PR description.

Please provide plaintext logs, provided image is unreadable and bigger than several lines of text anyways.

Thank you very much for your comments. I have made the necessary corrections as required.

[cederom]

Thank you @zkkkk12 great work! :-)

[linguini1]

Please fix the commit message to start with iperf: , so that there is a space after the colon.

Also try to shorten the commit title, it is too long so the check is failing.