[Backport 2.4] Fix test to use a file from another temp directory

[opensearch-trigger-bot]

Backport 9970617 from #5158.

[codecov-commenter]

Codecov Report

Merging #5163 (fae5b38) into 2.4 (9a85769) will decrease coverage by 0.08%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.4    #5163      +/-   ##
============================================
- Coverage     70.70%   70.61%   -0.09%     
+ Complexity    58364    58312      -52     
============================================
  Files          4700     4700              
  Lines        279108   279109       +1     
  Branches      40748    40748              
============================================
- Hits         197335   197106     -229     
- Misses        65312    65539     +227     
- Partials      16461    16464       +3     

Impacted Files	Coverage Δ
.../index/shard/IndexShardNotRecoveringException.java	0.00% <0.00%> (-100.00%)	⬇️
...adonly/AddIndexBlockClusterStateUpdateRequest.java	0.00% <0.00%> (-75.00%)	⬇️
...readonly/TransportVerifyShardIndexBlockAction.java	9.75% <0.00%> (-58.54%)	⬇️
...n/admin/indices/readonly/AddIndexBlockRequest.java	17.85% <0.00%> (-53.58%)	⬇️
...ava/org/opensearch/action/NoSuchNodeException.java	0.00% <0.00%> (-50.00%)	⬇️
...indices/readonly/TransportAddIndexBlockAction.java	20.68% <0.00%> (-41.38%)	⬇️
.../admin/cluster/reroute/ClusterRerouteResponse.java	60.00% <0.00%> (-40.00%)	⬇️
...earch/client/indices/GetIndexTemplatesRequest.java	46.15% <0.00%> (-38.47%)	⬇️
...luster/routing/allocation/RoutingExplanations.java	62.06% <0.00%> (-37.94%)	⬇️
...java/org/opensearch/threadpool/ThreadPoolInfo.java	56.25% <0.00%> (-37.50%)	⬇️
... and 488 more

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[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/6649/
• CommitID: fae5b38