chore: remove det CI upload step

[azhou-determined]

Ticket

Description

remove old CI upload step that uploaded test results to an in-house db/grafana.

Test Plan

Checklist

• Changes have been manually QA'd
• New features have been approved by the corresponding PM
• User-facing API changes have the "User-facing API Change" label
• Release notes have been added as a separate file under docs/release-notes/
  See Release Note for details.
• Licenses have been included for new code which was copied and/or modified from any external code

[netlify]

✅ Deploy Preview for determined-ui canceled.

Name	Link
🔨 Latest commit	bd323e4
🔍 Latest deploy log	https://app.netlify.com/sites/determined-ui/deploys/673f58de7dc2160009261d21

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.63%. Comparing base (d644094) to head (bd323e4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10227   +/-   ##
=======================================
  Coverage   57.63%   57.63%           
=======================================
  Files         751      751           
  Lines      103234   103234           
  Branches     3616     3618    +2     
=======================================
  Hits        59503    59503           
  Misses      43598    43598           
  Partials      133      133           

Flag	Coverage Δ
backend	43.80% <ø> (ø)
harness	67.37% <ø> (ø)
web	54.45% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles