Revert changes in AbstractPointGeometryFieldMapper

[heemin32]

The change made in AbstractPointGeometryFieldMapper class with commit 0503897 introduced a performace degradation during point data indexing. Reverting it therefore.

The change is about consolidating array format parsing code for point type in a single place to acheive following benefits.

1. Allow plugins to override array parsing logic. Plugins can add its own parsing logic for point field by providing object parser. However, it cannot override array format. Therefore, plugin have to use whatever implemented in AbstractPointGeometryFieldMapper class.
2. Enhanced code quality by removing duplicated code

There is no change in functionality because 1. There is no change in functionality in OpenSearch and 2. No plugins have its own parsing logic for point data in array format yet.

Signed-off-by: Heemin Kim heemin@amazon.com

Description

[Describe what this change achieves]

Issues Resolved

[List any issues this PR will resolve]

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
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)

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.

[github-actions]

Gradle Check (Jenkins) Run Completed with:

• RESULT: UNSTABLE ❌
• URL: https://build.ci.opensearch.org/job/gradle-check/6880/
• CommitID: 72fb1e8
  Please examine the workflow log, locate, and copy-paste the failure below, then iterate to green.
  Is the failure a flaky test unrelated to your change?

[andrross]

REPRODUCE WITH: ./gradlew ':plugins:repository-s3:yamlRestTest' --tests "org.opensearch.repositories.s3.RepositoryS3ClientYamlTestSuiteIT.test {yaml=repository_s3/20_repository_permanent_credentials/Snapshot and Restore with repository-s3 using permanent credentials}" -Dtests.seed=C17A7B3EB37A777E -Dtests.security.manager=true -Dtests.jvm.argline="-XX:TieredStopAtLevel=1 -XX:ReservedCodeCacheSize=64m" -Dtests.locale=es-GT -Dtests.timezone=Pacific/Johnston -Druntime.java=17 -Dtests.rest.denylist=repository_s3/30_repository_temporary_credentials/*,repository_s3/40_repository_ec2_credentials/*,repository_s3/50_repository_ecs_credentials/*,repository_s3/60_repository_eks_credentials/*

org.opensearch.repositories.s3.RepositoryS3ClientYamlTestSuiteIT > test {yaml=repository_s3/20_repository_permanent_credentials/Snapshot and Restore with repository-s3 using permanent credentials} FAILED
    java.lang.AssertionError: Failure at [repository_s3/20_repository_permanent_credentials:22]: expected [2xx] status code but api [snapshot.delete] returned [500 Internal Server Error]

Flaky test documented in #5219