[2.17] set custom rule doc id to the id passed in rule yaml instead of autogenerated name

[eirsep]

Description
when custom rule is created we are not setting rule document id to the string passed in rule yaml in id field. we autogenerate the id
this change sets custom rule doc id to the id passed in rule yaml instead of autogenerated id

Related Issues
Resolves #1301

[opensearch-trigger-bot]

The backport to 2.15 failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-2.15 2.15
# Navigate to the new working tree
cd .worktrees/backport-2.15
# Create a new branch
git switch --create backport/backport-1347-to-2.15
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 37e7abb200d71ef76537969f6166f691c8ecfd9f
# Push it to GitHub
git push --set-upstream origin backport/backport-1347-to-2.15
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.15

Then, create a pull request where the base branch is 2.15 and the compare/head branch is backport/backport-1347-to-2.15.