nit: Update deprecation message for _opendistro/_security/kibanainfo API

[shikharj05]

Description

Update deprecation message for _opendistro/_security/kibanainfo API

• Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation) Maintenance

• Why these changes are required?
  The security repo has lingering usages of the terms opendistro and kibana, these will be removed in 4.0
  For Deprecate legacy language from the security plugin repo in 3.0.0 for removal in 4.0.0 #5092 & Deprecate opendistro API paths #5097

• What is the old behavior before changes and new behavior after changes? Update of log line on using deprecated API.

2025-03-07 08:37:03 opensearch[data_0][transport_worker][T#4] DEPRECATION RestController:123 - [_opendistro/_security/kibanainfo] is a deprecated endpoint path. Please use _plugins/_security/dashboardsinfo instead.

Issues Resolved

#5097

Is this a backport? If so, please add backport PR # and/or commits #, and remove backport-failed label from the original PR.

Do these changes introduce new permission(s) to be displayed in the static dropdown on the front-end? If so, please open a draft PR in the security dashboards plugin and link the draft PR here

Testing

[Please provide details of testing done: unit testing, integration testing and manual testing]

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• API changes companion pull request created
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.70%. Comparing base (8803690) to head (80b6652).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5156   +/-   ##
=======================================
  Coverage   71.69%   71.70%           
=======================================
  Files         337      337           
  Lines       22781    22781           
  Branches     3604     3604           
=======================================
+ Hits        16332    16334    +2     
- Misses       4647     4649    +2     
+ Partials     1802     1798    -4     

Files with missing lines	Coverage Δ
...opensearch/security/rest/DashboardsInfoAction.java	81.25% <ø> (ø)

... and 7 files with indirect coverage changes

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[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/security/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/security/backport-2.x
# Create a new branch
git switch --create backport/backport-5156-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 01dd98cd0f6d50841ff1b8827b074e5eb09c8555
# Push it to GitHub
git push --set-upstream origin backport/backport-5156-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/security/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-5156-to-2.x.