feat: add Azure_SpecialHeaders_ConditionalRequest azure-modular integration test

[Copilot]

Adds Spector integration test coverage for azure/special-headers/conditional-request, which validates conditional request headers — both standard (If-Match, If-None-Match) and custom Azure-specific ones (x-ms-blob-if-match, x-ms-blob-if-none-match) — using the eTag type.

Changes

• cadl-ranch-list.js — added azure/special-headers/conditional-request entry to azureModularTsps
• generated/azure/special-headers/conditional-request/ — tspconfig.yaml, .gitignore, and rolled-up src/index.d.ts for ConditionalRequestClient
• azureSpecialHeadersConditionalRequest.spec.ts — 4 test cases covering all mockapi scenarios:
  • postIfMatch → If-Match: "valid"
  • postIfNoneMatch → If-None-Match: "invalid"
  • postCustomIfMatch → x-ms-blob-if-match: "valid"
  • postCustomIfNoneMatch → x-ms-blob-if-none-match: "invalid"

[v-jiaodi]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Merged main into this branch (commit dc6874b). The rename of cadl-ranch-list.js → spector-list.js from main was handled correctly — the azure/special-headers/conditional-request entry remains in the azureModularTsps array in the renamed file.