Changes for deploying ShimProxy on Kubernetes (miniKube)

[shuklas]

Description

Add Kubernetes/Helm chart infrastructure for deploying ShimProxy alongside Solr and OpenSearch clusters on minikube.

• New testSolrOSClusters aggregate Helm chart that bundles ShimProxy, OpenSearch (v2.32.0), and Solr (v9.7 with ZooKeeper sidecar) as sub-charts
• New shimProxy component Helm chart with configurable targets, transforms (via ConfigMap), auth, validators, health probes, and OTel support
• New solr component Helm chart running Solr in SolrCloud mode with an embedded ZooKeeper container
• Kubernetes Job (dataloader) to generate and load test data into both Solr and OpenSearch
• NodePort services for external access to all three services
• localTestingSolr.sh script for end-to-end local deployment: starts minikube, builds/pushes images to a local registry, deploys the chart, and sets up port-forwards (OpenSearch:9200, Solr:8983, ShimProxy:8080)
• Added --memory flag to minikubeLocal.sh and refactored its argument parsing
• Updated load_data.py to disable TLS verification for self-signed OpenSearch certs

Issues Resolved

N/A

Testing

• Deployed and validated end-to-end on minikube using localTestingSolr.sh
• Verified ShimProxy routes requests to both Solr and OpenSearch backends
• Confirmed dataloader Job successfully seeds test data into both clusters
• Validated NodePort access and port-forwarding for all three services

Check List

• New functionality includes testing
• Public documentation issue/PR created, if applicable.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
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[jugal-chauhan]

@shuklas Can we please fix the DCO here ?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.83%. Comparing base (ce71881) to head (cb02995).
⚠️ Report is 309 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #2640      +/-   ##
============================================
- Coverage     72.46%   71.83%   -0.64%     
+ Complexity       90       86       -4     
============================================
  Files           705      700       -5     
  Lines         32686    32033     -653     
  Branches       2815     2812       -3     
============================================
- Hits          23687    23010     -677     
- Misses         7723     7736      +13     
- Partials       1276     1287      +11     

Flag	Coverage Δ
gradle	68.32% <ø> (-0.32%)	⬇️
node	92.62% <ø> (ø)
python	75.36% <ø> (-1.34%)	⬇️

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