sched: move DUMP_ON_EXIT to sched

[Gary-Hobson]

Summary

Change DUMP_ON_EXIT to CONFIG_SCHED_DUMP_ON_EXIT and move it to the sched directory

Impact

Fix the bug in #13118, It uses undefined macros

Testing

[lupyuen]

[Experimental Bot, please feedback here]

Does this PR meet the NuttX Requirements?

No, the PR is missing crucial information.

Here's what's missing and needs to be added:

Summary:

• Why is this change necessary? Is it a bug fix? Code cleanup? Improved organization?
• What functional part of the code is changing? Be specific. For example, "This changes the way the scheduler dumps its state on exit."
• How does the change work? Explain the mechanism behind the change. For example, "This change renames the DUMP_ON_EXIT configuration option to CONFIG_SCHED_DUMP_ON_EXIT and moves its definition to the sched directory to improve code organization and clarity."

Impact:

• Carefully consider and address ALL impact points. Even if the impact is "NO", state it explicitly (e.g., "Impact on build: NO").
• For any "YES" impacts, provide details!

Testing:

• What build hosts did you test this on? (OS, CPU architecture, compiler)
• What target(s) did you test on? (architecture, board, configuration)
• Provide the actual testing logs before and after the change to demonstrate the impact.

Example of improved testing section:

Testing

I confirm that changes are verified on the local setup and work as intended:

• Build Host(s):
  • Ubuntu 22.04, x86_64, GCC 11.3.0
• Target(s):
  • sim:nsh configuration

Testing logs before change:

<Insert logs from running your test case before the change>

Testing logs after change:

<Insert logs from running your test case after the change>