[Backport 2.x] Remove empty if/try-finally in base integ test class

[opensearch-trigger-bot]

Backport 6e51c47 from #9098.

[opensearch-trigger-bot]

Compatibility status:

> Task :checkCompatibility
Checking compatibility for: https://github.com/opensearch-project/opensearch-oci-object-storage.git with ref: 2.x
Skipping compatibility check for https://github.com/opensearch-project/opensearch-oci-object-storage.git
Incompatible components: [https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/ml-commons.git]
Components skipped due to git failures: [https://github.com/opensearch-project/opensearch-oci-object-storage.git]
Compatible components: [https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/security-analytics.git]

BUILD SUCCESSFUL in 26m 59s

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/21827/
• CommitID: feed0a2
  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?

[kotwanikunal]

#9099 ?

Gradle Check (Jenkins) Run Completed with:

• RESULT: FAILURE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/21827/
• CommitID: feed0a2
  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]

Compatibility status:

> Task :checkCompatibility
Checking compatibility for: https://github.com/opensearch-project/opensearch-oci-object-storage.git with ref: 2.x
Skipping compatibility check for https://github.com/opensearch-project/opensearch-oci-object-storage.git
Incompatible components: [https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/ml-commons.git]
Components skipped due to git failures: [https://github.com/opensearch-project/opensearch-oci-object-storage.git]
Compatible components: [https://github.com/opensearch-project/security.git, https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/sql.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/security-analytics.git]

BUILD SUCCESSFUL in 33m 52s

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/21835/
• CommitID: f4102c7
  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?

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: SUCCESS ✅
• URL: https://build.ci.opensearch.org/job/gradle-check/21847/
• CommitID: f4102c7

[codecov]

Codecov Report

Merging #9102 (f4102c7) into 2.x (ae9373a) will increase coverage by 0.07%.
Report is 1 commits behind head on 2.x.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #9102      +/-   ##
============================================
+ Coverage     70.66%   70.74%   +0.07%     
- Complexity    57341    57410      +69     
============================================
  Files          4754     4754              
  Lines        271650   271650              
  Branches      40067    40067              
============================================
+ Hits         191975   192177     +202     
+ Misses        63167    62965     -202     
  Partials      16508    16508              

see 458 files with indirect coverage changes