Suppress false-positive Chromium child crash reports

[nwparker]

Summary

• Suppress recoverable Chromium GPU child-process exits from crash-report prompts.
• Suppress Chromium Network Service utility exits from crash-report prompts.
• Treat Windows control-termination killed statuses as normal termination rather than app crashes.

Slack evidence

• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779197206081009
• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779264381926569
• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779266879117849
• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779279587587199
• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779239096524529
• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779279925595249
• https://stablygroup.slack.com/archives/C0B4PDCMPPT/p1779277932097269

Validation

• pnpm vitest run --config config/vitest.config.ts src/main/crash-reporting/process-gone-classification.test.ts
• pnpm vitest run --config config/vitest.config.ts src/main/crash-reporting/process-gone-classification.test.ts src/main/window/createMainWindow.test.ts src/main/crash-reporting/crash-report-store.test.ts src/main/ipc/crash-reporting.test.ts src/shared/crash-reporting.test.ts
• pnpm run typecheck:node
• pnpm lint