chore: remove gha updates from renovate, use dependabot instead

[overbalance]

Goal

Rely on org-wide devops actions for GHA updates.

[github-actions]

Chrome DevTools Protocol Tracing (Script: 105.90ms, Heap: 13.94MB)

	Number of Requests	Size of Requests	Script Duration	Task Duration	Heap Used Size
Requests	+3 requests	+29.78 KB
Page Loaded			+15.22 ms	+5.22 ms	+0.93 MB
Generate 100 fetch requests			+15.94 ms	+77.87 ms	+2.25 MB
Generate 100 XHR requests			+36.26 ms	+96.24 ms	+2.30 MB
Click 100 buttons and generate 100 logs			+31.72 ms	+40.53 ms	+2.94 MB
Throw a 100 exceptions			-0.58 ms	+5.77 ms	+2.42 MB
End Session			+7.33 ms	+14.22 ms	+3.10 MB
Total	+3 requests	+29.78 KB	+105.90 ms	+239.84 ms	+13.94 MB

Lighthouse (Script Eval: 54.45ms)

	Difference	Description
Total Blocking Time	0 ms	Difference in Total Blocking Time: Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric.
Main Thread Time	+68.30 ms	Difference in Main Thread Time: Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work
Script Evaluation Time	+54.45 ms	Difference in Script Evaluation Time: Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Platform Tests (vite-7 gzip: 47.99KB)

vite-7 Platform Tests

	Total Uncompressed Size	Total Gzip Size
vite-7 - esnext	+164.67 KB	+47.99 KB
vite-7 - es2015	+171.51 KB	+49.67 KB

vite-otel-latest Platform Tests

	Total Uncompressed Size	Total Gzip Size
vite-otel-latest - esnext	+163.74 KB	+49.69 KB
vite-otel-latest - es2015	+170.50 KB	+51.32 KB

webpack-5 Platform Tests

	Total Uncompressed Size	Total Gzip Size
webpack-5 - esnext	+121.11 KB	+43.17 KB
webpack-5 - es2015	+122.22 KB	+44.65 KB