Bump dompurify from 3.2.7 to 3.4.5 (#5333)

* Initial plan

* Bump dompurify from 3.2.7 to 3.4.5 in all lockfiles

Agent-Logs-Url: https://github.com/microsoft/monaco-editor/sessions/dd7a8108-299a-482a-8cd9-36922022e2b3

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

* Remove overrides; update dompurify lockfile entries directly to 3.4.5

Agent-Logs-Url: https://github.com/microsoft/monaco-editor/sessions/d8782240-d0a3-4b70-85d7-6bbdc4ce4f07

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

* Bump dompurify to 3.4.5 within monaco-editor-core lockfile entries

Agent-Logs-Url: https://github.com/microsoft/monaco-editor/sessions/532edb9e-36d2-4d9a-94a8-236b4ff75551

Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: rzhao271 <7199958+rzhao271@users.noreply.github.com>