Not running is_fleet_ready checks if static node count is 0

[himani2411]

Description of changes

Initial PR was closed as I forced push some changes #2960

• Adding log for checking output
• Using Ruby yaml for looping to get count od static nodes
• Run static fleet checks if there are any static nodes

Tests

ruby_block[wait for static fleet capacity] action run[2025-06-17T15:34:30+00:00] INFO: Processing ruby_block[wait for static fleet capacity] action run (aws-parallelcluster-slurm::finalize_head_node line 197)
[2025-06-17T15:34:30+00:00] INFO: Count of cluster static nodes is 0
[2025-06-17T15:34:30+00:00] INFO: Static fleet capacity is ready

  ruby_block[wait for static fleet capacity] action run[2025-06-17T15:43:04+00:00] INFO: Processing ruby_block[wait for static fleet capacity] action run (aws-parallelcluster-entrypoints::test line 197)
[2025-06-17T15:43:04+00:00] INFO: Count of cluster static nodes is 12
[2025-06-17T15:43:04+00:00] INFO: Static fleet capacity is ready
[2025-06-17T15:43:04+00:00] INFO: ruby_block[wait for static fleet capacity] called

Tests

• Manual test
• ONGOING BELOW

test-suites:
  update:
    test_update.py::test_dynamic_file_systems_update:
      dimensions:
      - instances:
        - c5.xlarge
        oss:
        - alinux2023
        regions:
        - eu-west-2
        schedulers:
        - slurm
    test_update.py::test_dynamic_file_systems_update_data_loss:
      dimensions:
      - instances:
        - c5.xlarge
        oss:
        - rhel9
        regions:
        - eu-west-2
        schedulers:
        - slurm
    test_update.py::test_dynamic_file_systems_update_rollback:
      dimensions:
      - instances:
        - c5.xlarge
        oss:
        - rocky9
        regions:
        - rocky9
        schedulers:
        - slurm
    test_update.py::test_login_nodes_update:
      dimensions:
      - instances:
        - c5.xlarge
        oss:
        - rhel8
        regions:
        - us-east-2
        schedulers:
        - slurm
    test_update.py::test_multi_az_create_and_update:
      dimensions:
      - instances:
        - c5.xlarge
        oss:
        - alinux2
        regions:
        - eu-west-2
        schedulers:
        - slurm
    test_update.py::test_update_slurm:
      dimensions:
      - instances:
        - c5.xlarge
        oss:
        - rhel8
        regions:
        - eu-central-1

References

• Link to impacted open issues.
• Link to related PRs in other packages (i.e. cookbook, node).
• Link to documentation useful to understand the changes.

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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.