Abstracting Writeable to support multiple protocols

[VachaShah]

Description

Coming from #11910 (comment), abstracting out Writeable so that other serialization/deserialization protocols can be added extending BaseWriteable.

Related Issues

Resolves #[Issue number to be closed when this PR is merged]
Part of #10684

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Failing checks are inspected and point to the corresponding known issue(s) (See: Troubleshooting Failing Builds)
• Commits are signed per the DCO using --signoff
• Commit changes are listed out in CHANGELOG.md file (See: Changelog)
• Public documentation issue/PR created

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[github-actions]

Compatibility status:

Checks if related components are compatible with change 8537e4e

Incompatible components

Incompatible components: [https://github.com/opensearch-project/asynchronous-search.git, https://github.com/opensearch-project/observability.git, https://github.com/opensearch-project/reporting.git, https://github.com/opensearch-project/custom-codecs.git, https://github.com/opensearch-project/performance-analyzer.git, https://github.com/opensearch-project/performance-analyzer-rca.git, https://github.com/opensearch-project/cross-cluster-replication.git, https://github.com/opensearch-project/sql.git]

Skipped components

Compatible components

Compatible components: [https://github.com/opensearch-project/security-analytics.git, https://github.com/opensearch-project/anomaly-detection.git, https://github.com/opensearch-project/job-scheduler.git, https://github.com/opensearch-project/opensearch-oci-object-storage.git, https://github.com/opensearch-project/common-utils.git, https://github.com/opensearch-project/notifications.git, https://github.com/opensearch-project/alerting.git, https://github.com/opensearch-project/index-management.git, https://github.com/opensearch-project/ml-commons.git, https://github.com/opensearch-project/neural-search.git, https://github.com/opensearch-project/geospatial.git, https://github.com/opensearch-project/k-nn.git, https://github.com/opensearch-project/security.git]

[github-actions]

✅ Gradle check result for 8537e4e: SUCCESS

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e265355) 71.41% compared to head (8537e4e) 71.33%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #11958      +/-   ##
============================================
- Coverage     71.41%   71.33%   -0.09%     
+ Complexity    59397    59380      -17     
============================================
  Files          4923     4923              
  Lines        279212   279212              
  Branches      40595    40595              
============================================
- Hits         199408   199184     -224     
- Misses        63223    63473     +250     
+ Partials      16581    16555      -26     

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[VachaShah]

Incorporating the abstractions in #11910 itself. Closing this PR.