Initial Support for Slurm 26.05

[hanwen-cluster]

Description of changes

Slurm 26.05 adds two keys to each job in the SLURM_RESUME_FILE:

• exclusive
• priority

Changelog: 26.05.0rc1 ("Add job priority value to SLURM_RESUME_FILE"), L465 ("Add exclusive to the SLURM_RESUME_FILE"). Code: power_save.c.

SlurmResumeJob(**job) raised TypeError: unexpected keyword argument 'exclusive', which failed the whole resume. As a result, ParallelCluster could not launch dynamic nodes with Slurm 26.05.

This commit:

• [Must have] Accepts exclusive and priority, and ignores any key a future Slurm adds, so new Resume File fields no longer break scaling.
• [Cleanup BTW] Removes SlurmResumeJob.is_exclusive(). It had no caller since [develop] Remove separation between oversubscribe and no-oversubscribe jobs #574 (job-level scaling for all jobs).

Backward compatible: Slurm 25.11 doesn't emit either key, so both default to None and parsing is unchanged.

Note: this is an initial support for Slurm 26.05 to allow ParallelCluster scale correctly. This commit doesn't upgrade consider incorporating new Slurm features.

Tests

Build image is successful. The following tests have passed:

{%- import 'common.jinja2' as common with context -%}
{{- common.OSS_COMMERCIAL_X86.append("rocky8") or "" -}}
{{- common.OSS_COMMERCIAL_X86.append("rocky9") or "" -}}
---
test-suites:
  basic:
    test_essential_features.py::test_essential_features:
...
  schedulers:
    test_slurm.py::test_slurm:
...
    test_slurm.py::test_slurm_from_login_nodes_in_private_network:
...
    test_slurm.py::test_slurm_scaling:
...
    test_slurm.py::test_error_handling:
...
    test_slurm.py::test_clustermgtd_instance_id_matching:
...
    test_slurm.py::test_slurm_maintenance_reservation:
...
    test_slurm.py::test_slurm_protected_mode:
...
    test_slurm.py::test_slurm_protected_mode_on_cluster_create:
...
    test_slurm.py::test_fast_capacity_failover:
...
    test_slurm.py::test_expedited_requeue:
...
    test_slurm.py::test_slurm_config_update:
...
    test_slurm.py::test_slurm_memory_based_scheduling:
...
    test_slurm.py::test_scontrol_reboot:
...
    test_slurm.py::test_scontrol_reboot_ec2_health_checks:
...
    test_slurm.py::test_slurm_overrides:
...
    test_slurm_accounting.py::test_slurm_accounting:
...
    test_slurm_accounting.py::test_slurm_accounting_external_dbd:
...
    test_slurm.py::test_slurm_custom_config_parameters:
...
    test_slurm.py::test_slurm_ticket_17399:
...
    test_slurm.py::test_slurm_custom_partitions:
...
    test_custom_munge_key.py::test_custom_munge_key:
...
    test_slurm_rest_api.py::test_slurm_rest_api:
...
  pyxis:
    test_pyxis.py::test_pyxis:
...

Checklist

• Make sure you are pointing to the right branch.
• If you're creating a patch for a branch other than develop add the branch name as prefix in the PR title (e.g. [release-3.6]).
• Check all commits' messages are clear, describing what and why vs how.
• Make sure to have added unit tests or integration tests to cover the new/modified code.
• Check if documentation is impacted by this change.

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By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[hanwen-cluster]

This is dangling code, so is removed.
See details in the PR description