test(editor): wait longer for "detects diagnostics on run" fixture

[Sysix]

Another task is flaky changing oxc.typeAware will revalidate the tsgolint diagnostics , but not sure if this is related with oxc-project/tsgolint#349

[Sysix]

• test(editor): wait longer for "detects diagnostics on run" fixture #15156 👈 (View in Graphite)
• main

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[Copilot]

Pull Request Overview

This PR improves test reliability and assertion precision in the VSCode extension's E2E diagnostic tests. The changes address potential timing issues and make test assertions more specific.

• Increased sleep duration in the 'detects diagnostics on run' test to reduce flakiness
• Replaced loose assertion with strict equality check for diagnostic count validation

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[Sysix]

Merging without a review because it's only tests and the stack of #14472 will grow :)

[Sysix]

Merge activity

• Oct 30, 8:14 PM UTC: The merge label '0-merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Oct 30, 8:15 PM UTC: Sysix added this pull request to the Graphite merge queue.
• Oct 30, 8:19 PM UTC: Merged by the Graphite merge queue.