[WIP] Add tests for TSP fill spector functionality

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>tsp, fill spector tests</issue_title>
<issue_description>Refer to this PR to see test cases that should be added: https://github.com/microsoft/typespec/pull/9172/files

documentation and specialwords should be supported and can add tests.

Follow https://github.com/microsoft/typespec/blob/main/.github/instructions/http-client-java.instructions.md#add-end-to-end-e2e-test-case for the steps.

.tsp files can be found in https://github.com/microsoft/typespec/tree/main/packages/http-specs/specs and https://github.com/Azure/typespec-azure/tree/main/packages/azure-http-specs/specs
</issue_description>

<agent_instructions>Follow https://github.com/microsoft/typespec/blob/main/.github/instructions/http-client-java.instructions.md#add-end-to-end-e2e-test-case for the steps.

.tsp files can be found in https://github.com/microsoft/typespec/tree/main/packages/http-specs/specs and https://github.com/Azure/typespec-azure/tree/main/packages/azure-http-specs/specs</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes tsp, fill spector tests #3244

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