ci_: add proxy creds

[mendelskiv93]

Ref #6211

[github-actions]

We require commits to follow the Conventional Commits, but with _ for non-breaking changes.
Please fix these commit messages:

test:_ check if vars exist

[status-im-auto]

Jenkins Builds

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	bad1b08	#1	2024-12-13 15:59:06	~4 min	macos	📦zip
✔️	bad1b08	#1	2024-12-13 15:59:11	~4 min	ios	📦zip
✔️	bad1b08	#1	2024-12-13 15:59:16	~4 min	linux	📦zip
✖️	bad1b08	#1	2024-12-13 15:59:22	~4 min	tests-rpc	📄log
✔️	bad1b08	#1	2024-12-13 16:00:07	~5 min	windows	📦zip
✔️	bad1b08	#1	2024-12-13 16:00:26	~5 min	android	📦aar
✔️	bad1b08	#1	2024-12-13 16:08:14	~13 min	macos	📦zip
✔️	bad1b08	#1	2024-12-13 16:26:47	~32 min	tests	📄log

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 60.06%. Comparing base (74db631) to head (bad1b08).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6214      +/-   ##
===========================================
- Coverage    61.27%   60.06%   -1.22%     
===========================================
  Files          833      833              
  Lines       109910   109910              
===========================================
- Hits         67348    66018    -1330     
- Misses       34711    36133    +1422     
+ Partials      7851     7759      -92     

Flag	Coverage Δ
functional	0.82% <ø> (-18.52%)	⬇️
unit	60.02% <ø> (-0.07%)	⬇️

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see 91 files with indirect coverage changes