chore_: LoginAccount simplifications

[igor-sirotin]

Required for status-im/status-desktop#17273

Description

In LoginAccount:

1. Ensure provided Mnemonic key uid matches the given KeyUID
2. Automatically get kdfIterations from multiaccounts database.kdfIteractions argument is deprecated with a fallback.

Both changes are needed for Start using this account without account login flow.

[status-im-auto]

Jenkins Builds

❔	Commit	#️⃣	Finished (UTC)	Duration	Platform	Result
✔️	f41440e	#1	2025-02-11 21:23:47	~3 min	macos	📦zip
✔️	f41440e	#1	2025-02-11 21:24:58	~5 min	macos	📦zip
✔️	f41440e	#1	2025-02-11 21:25:09	~5 min	linux	📦zip
✔️	f41440e	#1	2025-02-11 21:25:32	~5 min	windows	📦zip
✔️	f41440e	#1	2025-02-11 21:25:54	~6 min	ios	📦zip
✔️	f41440e	#1	2025-02-11 21:28:13	~8 min	tests-rpc	📄log
✔️	f41440e	#1	2025-02-11 21:50:39	~30 min	tests	📄log
✔️	f41440e	#2	2025-02-12 12:42:28	~5 min	android	📦aar

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 4 lines in your changes missing coverage. Please review.

Project coverage is 60.35%. Comparing base (735b574) to head (f41440e).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
api/geth_backend.go	33.33%	3 Missing and 1 partial ⚠️

❌ Your patch status has failed because the patch coverage (33.33%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6338      +/-   ##
===========================================
- Coverage    60.41%   60.35%   -0.06%     
===========================================
  Files          845      845              
  Lines       111357   111362       +5     
===========================================
- Hits         67274    67214      -60     
- Misses       36279    36329      +50     
- Partials      7804     7819      +15     

Flag	Coverage Δ
functional	0.45% <0.00%> (-0.01%)	⬇️
unit	60.37% <33.33%> (-0.06%)	⬇️

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

Files with missing lines	Coverage Δ
protocol/requests/login.go	57.14% <ø> (ø)
api/geth_backend.go	53.96% <33.33%> (-0.11%)	⬇️

... and 25 files with indirect coverage changes