Reclassify nodeModulesAllowJsImportAssignment JS emit diffs as accepted baselines

[Copilot]

JS declaration emit for import = require(...) in JS now includes export import, which changes surface shape versus prior Strada output. This PR treats that output as the expected direction and reclassifies the affected baselines from triaged to accepted.

• Baseline classification update

  • Removed these entries from testdata/submoduleTriaged.txt:
    • conformance/nodeModulesAllowJsImportAssignment(module=node16).js.diff
    • conformance/nodeModulesAllowJsImportAssignment(module=node18).js.diff
    • conformance/nodeModulesAllowJsImportAssignment(module=node20).js.diff
    • conformance/nodeModulesAllowJsImportAssignment(module=nodenext).js.diff
  • Added the same entries to testdata/submoduleAccepted.txt.

• Reference baseline relocation

  • Moved corresponding .diff files from:
    • testdata/baselines/reference/submoduleTriaged/conformance/
  • To:
    • testdata/baselines/reference/submoduleAccepted/conformance/

• Representative diff behavior

  // previous baseline expectation
  import fs2 = require("fs")
  
  // current/accepted expectation
  export import fs2 = require("fs")