Add deprecation warning for /_cat/snapshots in favor of /_cat/snapshots/{repository}

[finnegancarroll]

Description

Per #16648 mark /_cat/snapshots as deprecated. Redundant with the more explicit /_cat/snapshots/{repository}.

Adds deprecation log for this route:

~/fdev curl -i -H "Accept: application/json" -H "X-Opaque-Id: 123" "localhost:9200/_cat/snapshots"
HTTP/1.1 400 Bad Request
X-Opaque-Id: 123
Warning: 299 OpenSearch-3.0.0-SNAPSHOT-4a53ff24adbec1d5aeb3d73548171870a3de925d "[/_cat/snapshots] is a deprecated endpoint. Please use [/_cat/snapshots/{repository}] instead."
X-OpenSearch-Version: OpenSearch/3.0.0-SNAPSHOT (opensearch)
content-type: application/json; charset=UTF-8
content-length: 243

Related Issues

Resolves #16648

Check List

• Functionality includes testing.
• API changes companion pull request created, if applicable.
• Public documentation issue/PR created, if applicable.

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[github-actions]

❕ Gradle check result for bfa304e: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.38%. Comparing base (82bbdfb) to head (96f95e9).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #16960      +/-   ##
============================================
- Coverage     72.59%   72.38%   -0.21%     
+ Complexity    65798    65686     -112     
============================================
  Files          5311     5311              
  Lines        304888   304890       +2     
  Branches      44212    44212              
============================================
- Hits         221323   220686     -637     
- Misses        65501    66110     +609     
- Partials      18064    18094      +30     

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[reta]

Could you please add test case to rest-api-spec/test/cat.snapshots/10_basic.yml and check for deprecation message, thank you.

[reta]

Also please add CHANGELOG entry (for 3.x?), thank you

[github-actions]

❌ Gradle check result for 541896e: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[opensearch-trigger-bot]

This PR is stalled because it has been open for 30 days with no activity.

[github-actions]

❕ Gradle check result for 37da999: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.

[github-actions]

❌ Gradle check result for 96f95e9: FAILURE

Please examine the workflow log, locate, and copy-paste the failure(s) below, then iterate to green. Is the failure a flaky test unrelated to your change?

[finnegancarroll]

testMixedModeRelocation_FailInFinalize is flaky

[github-actions]

❕ Gradle check result for 96f95e9: UNSTABLE

Please review all flaky tests that succeeded after retry and create an issue if one does not already exist to track the flaky failure.