feat!: remove cis-xlsx-to-oscal-catalog task

[rishi-jat]

Types of changes

• Hot fix (emergency fix and release)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (change which affects the documentation site)
• Release (develop -> main)

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Quality assurance (all should be covered).

• My code follows the code style of this project.
• Documentation for my change is up to date?
• My PR meets testing requirements.
• All new and existing tests passed.
• All commits are signed-off.

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Summary

Closes #1811

This PR removes the cis-xlsx-to-oscal-catalog task.

As discussed in the issue, this task incorrectly transformed CIS Benchmarks into OSCAL Catalogs. Since CIS Benchmarks represent OSCAL Component Definitions, the correct task to use is cis-xlsx-to-oscal-cd.

Changes Included

• Removed task implementation (trestle/tasks/cis_xlsx_to_oscal_catalog.py)
• Removed associated tests and test data
• Removed API documentation for the task
• Removed all references to the deprecated task

This is a breaking change intended for the v4 release per the guidance in issue #1811.

[rishi-jat]

/cc @degenaro
/cc @vikas-agarwal76

[Copilot]

Pull request overview

Removes the deprecated cis-xlsx-to-oscal-catalog task (and its supporting artifacts) because CIS Benchmarks should be represented as OSCAL Component Definitions, with cis-xlsx-to-oscal-cd being the correct replacement (per #1811).

Changes:

• Removed the cis-xlsx-to-oscal-catalog task implementation.
• Removed associated unit tests, configs, and XLSX test fixtures.
• Removed generated API reference documentation for the removed task module.

Reviewed changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
trestle/tasks/cis_xlsx_to_oscal_catalog.py	Deletes the task implementation (breaking removal).
tests/trestle/tasks/cis_xlsx_to_oscal_catalog_test.py	Deletes unit tests covering the removed task.
tests/data/tasks/cis-xlsx-to-oscal-catalog/test-cis-xlsx-to-oscal-catalog.rhel.config	Deletes task test config (RHEL).
tests/data/tasks/cis-xlsx-to-oscal-catalog/test-cis-xlsx-to-oscal-catalog.ocp.config	Deletes task test config (OCP).
tests/data/tasks/cis-xlsx-to-oscal-catalog/CIS_Red_Hat_Enterprise_Linux_8_Benchmark_v2.0.0.snippet.xlsx	Deletes XLSX fixture used by removed task/tests.
tests/data/tasks/cis-xlsx-to-oscal-catalog/CIS_RedHat_OpenShift_Container_Platform_Benchmark_v1.2.0-2.snippet.xlsx	Deletes XLSX fixture used by removed task/tests.
docs/reference/API/trestle/tasks/cis_xlsx_to_oscal_catalog.md	Removes API reference page for the deleted module.

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[vikas-agarwal76]

@rishi-jat We are deferring this for now. There are some discussions happening with CIS team on this. Once we have a clearer picture we will decide on this.