Adds missing field due to new opensearch version

[Jakob3xD]

Description

Fix current integration tests due to missing fields.

Issues Resolved

List any issues this PR will resolve, e.g. Closes [...].

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.96%. Comparing base (06a6dc8) to head (4447aee).
Report is 25 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #552       +/-   ##
===========================================
+ Coverage   57.29%   67.96%   +10.67%     
===========================================
  Files         315      376       +61     
  Lines        9823     8853      -970     
===========================================
+ Hits         5628     6017      +389     
+ Misses       2902     1555     -1347     
+ Partials     1293     1281       -12     

Flag	Coverage Δ
integration	60.39% <ø> (+9.55%)	⬆️
unit	15.28% <ø> (+2.43%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
opensearchapi/api_cat-shards.go	100.00% <ø> (ø)
opensearchapi/api_indices-stats.go	85.71% <ø> (+2.38%)	⬆️
opensearchapi/api_nodes-stats.go	100.00% <ø> (ø)
plugins/security/api_securityconfig-get.go	100.00% <ø> (ø)

... and 269 files with indirect coverage changes

[dblock]

I think the CHANGELOG should just say "Added support for OpenSearch 2.14", although mentioning fields is fine too.

There's a tab/space change here (https://github.com/opensearch-project/opensearch-go/pull/552/files?w=1 shows a clean diff), is this not desired or are we correcting poor auto-format from before?

Feel free to amend or just merge.

[Jakob3xD]

There's a tab/space change here (https://github.com/opensearch-project/opensearch-go/pull/552/files?w=1 shows a clean diff), is this not desired or are we correcting poor auto-format from before?

Correcting poor format as the new line between the messages is unneded.

[dblock]

There's a tab/space change here (https://github.com/opensearch-project/opensearch-go/pull/552/files?w=1 shows a clean diff), is this not desired or are we correcting poor auto-format from before?

Correcting poor format as the new line between the messages is unneded.

I didn't mean CHANGELOG, in all the .go files there's a diff spacing.

[Jakob3xD]

I didn't mean CHANGELOG, in all the .go files there's a diff spacing.

The Spacing is done automatically by go fmt as the new struct field name is so long.