Updated KNN To use String for indexing vectors

---

schema-version: '1.1'
build:
name: OpenSearch
version: 2.14.0
ci:
image:
name: opensearchstaging/ci-runner:ci-runner-almalinux8-opensearch-build-v1
args: -e JAVA_HOME=/opt/java/openjdk-21
components:

• name: OpenSearch
  repository: https://github.com/navneet1v/OpenSearch.git
  ref: build-time-poc
• name: common-utils
  repository: https://github.com/opensearch-project/common-utils.git
  ref: 2.x
  platforms:
  • linux
  • windows
• name: security
  repository: https://github.com/opensearch-project/security.git
  ref: 2.x
  platforms:
  • linux
  • windows
• name: k-NN
  repository: https://github.com/navneet1v/k-NN.git
  ref: build-time-poc
  platforms:
  • linux
  • windows