Enable accessibilityAudit on `blob-viewer.test.ts` and `code-monitoring.test.ts`

Created by: gitstart-sourcegraph

Description

This Pull Request is about enabling accessibility audit on blob-viewer and code-monitoring pages in its integration test

Refs

SG Issue Gitstart Ticket

Test plan

Run the integration test ENTERPRISE=1 HEADLESS=true yarn test-integration:base client/web/src/integration/blob-viewer.test.ts and ENTERPRISE=1 HEADLESS=true yarn test-integration:base client/web/src/integration/code-monitoring.test.ts

Success criteria

• All integration tests with percy snapshots have accessibilityAudit enabled

App preview:

• Link

Check out the client app preview documentation to learn more.