fix(tool): Group custom_lint packages in renovate config

[Leptopoda]

should unblock #2596 and #2559

[provokateurin]

Thanks, I already noticed it as well but didn't have the time to fix it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.85%. Comparing base (420e3cf) to head (3470f36).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2607      +/-   ##
==========================================
+ Coverage   28.84%   28.85%   +0.01%     
==========================================
  Files         370      370              
  Lines      136488   136528      +40     
==========================================
+ Hits        39369    39396      +27     
- Misses      97119    97132      +13     

Flag	Coverage Δ		*Carryforward flag
account_repository	98.47% <ø> (ø)
cookie_store	99.48% <ø> (ø)
dashboard_app	96.05% <ø> (ø)
dynamite	31.05% <ø> (ø)
dynamite_end_to_end_test	61.69% <ø> (ø)
dynamite_runtime	85.40% <ø> (ø)
interceptor_http_client	97.18% <ø> (ø)
neon_dashboard	96.05% <ø> (ø)		Carriedforward from 86c401f
neon_framework	61.17% <ø> (+0.06%)	⬆️
neon_http_client	97.50% <ø> (ø)
neon_notifications	100.00% <ø> (ø)		Carriedforward from 86c401f
neon_storage	94.66% <ø> (ø)
neon_talk	99.45% <ø> (ø)		Carriedforward from 86c401f
nextcloud	24.33% <ø> (+0.01%)	⬆️
notifications_app	97.40% <ø> (ø)
notifications_push_repository	98.11% <ø> (ø)
sort_box	90.90% <ø> (ø)
talk_app	98.94% <ø> (ø)

*This pull request uses carry forward flags. Click here to find out more.