chore(ci): remove e2e test metric recording

Description

This change removes the automated metrics collection system from the end-to-end testing pipeline. Previously, after running browser tests, the system would automatically send test results and performance data to an InfluxDB database for monitoring and analysis purposes.

The influx instance has been removed and this hasn't been working for 4+ months, prior to that, these metrics were not being used.

This will fix this warning: https://gitlab.com/gitlab-org/gitlab-vscode-extension/-/jobs/13463059948#L1311

Related Issues

gitlab-org/quality/analytics#30 (comment 2841647568) gitlab-org/quality/quality-engineering/team-tasks#4325 (closed)

How has this been tested?

• If src/browser or src/common has been modified, please consider interoperability with the Web IDE. See Running the Extension in WebIDE.
• Consider an end-to-end test for significant new features that aren't covered by integration tests.

Screenshots (if appropriate)

What CHANGELOG entry will this MR create?

• fix: Bug fix fixes - a user-facing issue in production - included in changelog
• feature: New feature - a user-facing change which adds functionality - included in changelog
• BREAKING CHANGE: (fix or feature that would cause existing functionality to change) - should bump major version, mentioned in the changelog
• None - other non-user-facing changes