[Backport 1.x] Updating .gitattributes for additional file types

[saratvemulapalli]

Description

Backporting #1727 to 1.x

Issues Resolved

Closes #1713

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• 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.

[opensearch-ci-bot]

Can one of the admins verify this patch?

[opensearch-ci-bot]

❌   Gradle Check failure 031900f
Log 1584

Reports 1584

[saratvemulapalli]

REPRODUCE WITH: ./gradlew ':server:internalClusterTest' --tests "org.opensearch.discovery.StableMasterDisruptionIT.testStaleMasterNotHijackingMajority" -Dtests.seed=28AD28E1A3FF50C7 -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=en-PH -Dtests.timezone=Etc/GMT+8 -Druntime.java=15

org.opensearch.discovery.StableMasterDisruptionIT > testStaleMasterNotHijackingMajority FAILED
    java.lang.AssertionError: node_t1: [Tuple [v1=node_t2, v2=null]]
        at __randomizedtesting.SeedInfo.seed([28AD28E1A3FF50C7:77AB65EE82248FCB]:0)
        at org.junit.Assert.fail(Assert.java:88)
        at org.junit.Assert.assertTrue(Assert.java:41)
        at org.opensearch.discovery.StableMasterDisruptionIT.lambda$testStaleMasterNotHijackingMajority$5(StableMasterDisruptionIT.java:253)
        at org.opensearch.test.OpenSearchTestCase.assertBusy(OpenSearchTestCase.java:1048)
        at org.opensearch.test.OpenSearchTestCase.assertBusy(OpenSearchTestCase.java:1021)
        at org.opensearch.discovery.StableMasterDisruptionIT.testStaleMasterNotHijackingMajority(StableMasterDisruptionIT.java:250)

> Task :client:rest-high-level:javadoc
> Task :client:rest-high-level:spotlessCheck
> Task :client:rest-high-level:check

> Task :server:internalClusterTest

[saratvemulapalli]

start gradle check

[opensearch-ci-bot]

✅   Gradle Check success 031900f
Log 1585

Reports 1585