Add INCLUDE_JOBS parameter to pre_defined_pr_test pipeline

[xwjiang-ms]

Description of PR

Summary:
Pass the INCLUDE_JOBS parameter through pre_defined_pr_test.yml so that pre-defined PR test runs can execute the full job set (default "all"), complementing the change introduced in #23123.

Type of change

• Bug fix
• Testbed and Framework(new/improvement)
• New Test case
  • Skipped for non-supported platforms
• Test case improvement

Back port request

• 202205
• 202305
• 202311
• 202405
• 202411
• 202505
• 202511

Approach

What is the motivation for this PR?

#23123 added INCLUDE_JOBS to pr_test_template.yml with a default of t0_job,t1_job,t2_job so that regular PR tests stay scoped to t0/t1/t2, while baseline tests pass INCLUDE_JOBS: all to run every job. However, pre_defined_pr_test.yml was not updated and therefore could not pass INCLUDE_JOBS through to the shared template. Pre-defined PR tests should be able to run all tests, so this parameter needs to be plumbed through.

How did you do it?

• Added a new INCLUDE_JOBS parameter (type: string, default: "all") to pre_defined_pr_test.yml.
• Passed INCLUDE_JOBS into the stage template variables so the downstream pr_test_template.yml receives it and enables all jobs by default.

How did you verify/test it?

Verified the pipeline YAML syntax is valid and the parameter is correctly forwarded to the stage template variables.

Any platform specific information?

N/A

Supported testbed topology if it's a new test case?

N/A

Documentation

N/A

[mssonicbld]

/azp run

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