parallel get_snapshot_storages (backport #17589)

[mergify]

This is an automatic backport of pull request #17589 done by Mergify.
Cherry-pick of 738cc95 has failed:

On branch mergify/bp/v1.7/pr-17589
Your branch is up to date with 'origin/v1.7'.

You are currently cherry-picking commit 738cc9549.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   runtime/src/accounts_db.rs
	both modified:   runtime/src/bank.rs
	both modified:   runtime/src/serde_snapshot/tests.rs

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://help.github.com/articles/checking-out-pull-requests-locally/

---

Mergify commands and options

More conditions and actions can be found in the documentation.

You can also trigger Mergify actions by commenting on this pull request:

• @Mergifyio refresh will re-evaluate the rules
• @Mergifyio rebase will rebase this PR on its base branch
• @Mergifyio update will merge the base branch into this PR
• @Mergifyio backport <destination> will backport this PR on <destination> branch

Additionally, on Mergify dashboard you can:

• look at your merge queues
• generate the Mergify configuration with the config editor.

Finally, you can contact us on https://mergify.io/

[mergify]

automerge label removed due to a CI failure

[mergify]

automerge label removed due to a CI failure

[codecov]

Codecov Report

Merging #17679 (e402e43) into v1.7 (a00fbbf) will decrease coverage by 0.0%.
The diff coverage is 98.5%.

@@            Coverage Diff            @@
##             v1.7   #17679     +/-   ##
=========================================
- Coverage    82.6%    82.6%   -0.1%     
=========================================
  Files         428      428             
  Lines      119576   119618     +42     
=========================================
+ Hits        98789    98816     +27     
- Misses      20787    20802     +15