v1.16: validator: deprecates --disable-accounts-disk-index (backport of #33850)

[mergify]

This is an automatic backport of pull request #33850 done by Mergify.
Cherry-pick of c55a6e5 has failed:

On branch mergify/bp/v1.16/pr-33850
Your branch is up to date with 'origin/v1.16'.

You are currently cherry-picking commit c55a6e55a1.
  (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:   validator/src/cli.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://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/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.com

[codecov]

Codecov Report

Merging #34069 (c653037) into v1.16 (1776575) will decrease coverage by 0.1%.
The diff coverage is 100.0%.

Additional details and impacted files

@@            Coverage Diff            @@
##            v1.16   #34069     +/-   ##
=========================================
- Coverage    81.8%    81.8%   -0.1%     
=========================================
  Files         766      766             
  Lines      209076   209075      -1     
=========================================
- Hits       171168   171100     -68     
- Misses      37908    37975     +67