test(ts-plugin): return normalized results from the e2e tsserver client

[mizdra]

Summary

Test-only change to the ts-plugin e2e test utilities. No behavior change to the plugin itself.

Changes

• Make the e2e tsserver client return normalized results for Go to Definition, Find All References, Rename, completion, and code fixes
  • Only the fields the tests care about are kept, paths are normalized, and results are sorted by file path then position, so tests can compare them directly with toStrictEqual
• Move the normalize helpers that tests used to call on both sides of an assertion into the client and stop exporting them
• Replace the getLoc / getRange fixture helpers with getFileLocation (request arguments) and getFileSpan (expected values, optionally with the enclosing context range)
• Rewrite expected values in the affected tests in the new form; the set of tests and their expected results are unchanged

How to verify

vp test --project e2e
vp check

Both should pass with the same test count as main (167 passed, 2 todo).

🤖 Generated with Claude Code

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