Move load_accounts to runtime

[LucasSte]

Problem

Accounts::load_accounts is used only in runtime and needs only two functions from AccoutnsDb as a dependency. The code is better suited to the runtime folder.

Summary of Changes

I moved Accounts::load_accounts and its dependencies to runtime/accounts.

[codecov]

Codecov Report

Merging #34017 (4204ea6) into master (60fdd85) will decrease coverage by 0.1%.
Report is 2 commits behind head on master.
The diff coverage is 96.9%.

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #34017     +/-   ##
=========================================
- Coverage    81.9%    81.9%   -0.1%     
=========================================
  Files         816      817      +1     
  Lines      219751   219760      +9     
=========================================
+ Hits       180027   180033      +6     
- Misses      39724    39727      +3     

[brooksprumo]

Also FYI, when addressing PR feedback and pushing those changes, using force-push often makes it harder for me as a reviewer to re-review and actually see what has changed. There's no exact science, but I do recommend against force-pushing when possible.

Also refer to https://github.com/solana-labs/solana/blob/master/CONTRIBUTING.md#is-your-pr-easy-to-say-yes-to. It has some guidance on force-pushing as well.

Thanks!

[LucasSte]

Also FYI, when addressing PR feedback and pushing those changes, using force-push often makes it harder for me as a reviewer to re-review and actually see what has changed. There's no exact science, but I do recommend against force-pushing when possible.

Also refer to https://github.com/solana-labs/solana/blob/master/CONTRIBUTING.md#is-your-pr-easy-to-say-yes-to. It has some guidance on force-pushing as well.

Thanks!

Thanks for the guidance. I'll keep an eye on that document for further contributions.