Add new bulk create constructor without optional _id field

[camerondurham]

Change (latest - revision 2)

Added new create_no_id and new_no_id constructors/helpers to support bulk create operations where no _id field is required.

Change (revision 1)

Changed types to id: Option<S> when _id is optional in the bulk request, otherwise, keep id parameter as String.

This change is making the Bulk operation constructor parameters more closely match the Bulk API, specifically when _id is required or not.

Summarized from the docs: https://www.elastic.co/guide/en/elasticsearch/reference/7.10/docs-bulk.html#bulk-api-request-body

• create: _id (optional, string)
• delete: _id (required, string)
• index: _id (optional, string)
• update _id (required, string)

Issues Resolved

Related to, and may close issue #241 .

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[dblock]

@Xtansia take a look?

Regarding a breaking change: if it can be avoided it's best. Then we don't need to do a major release and break users. You can deprecate the old method.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.85%. Comparing base (41417d4) to head (2dc360c). Report is 2 commits behind head on main.

:exclamation: Current head 2dc360c differs from pull request most recent head 56e0316. Consider uploading reports for the commit 56e0316 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #245 +/- ## ========================================== + Coverage 79.71% 79.85% +0.13% ========================================== Files 418 417 -1 Lines 71104 69599 -1505 ========================================== - Hits 56682 55575 -1107 + Misses 14422 14024 -398 ``` | [Flag](https://app.codecov.io/gh/opensearch-project/opensearch-rs/pull/245/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | Coverage Δ | | |---|---|---| | [integration](https://app.codecov.io/gh/opensearch-project/opensearch-rs/pull/245/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) | `79.85% <ø> (+0.13%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project#carryforward-flags-in-the-pull-request-comment) to find out more.

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[camerondurham]

It totally makes sense to avoid breaking change. And "making the Rust interface more consistent" doesn't seem to add enough value to warrant a version bump, imo. I'll revise to add new optional constructor from #241 in a non-breaking way.

Testing

And thanks for running test cases, I see I missed updating a bunch of tests will work on that.

I had some trouble running these tests locally so didn't catch this before opening the CR.

https://github.com/opensearch-project/opensearch-rs/actions/runs/8535970109/job/23406883030?pr=245#step:5:446

15  |   ops.push(BulkOperation::index(json!({
    |  __________^^^^^^^^^^^^^^^^^^^^_-
16  | |         "user": "kimchy",
17  | |         "post_date": "2009-11-15T00:00:00Z",
18  | |         "message": "Trying out OpenSearch, so far so good?"
19  | |     }))
    | |______- an argument of type `Option<_>` is missing

[Xtansia]

I also don't feel this warrants a breaking version bump just for this, however there is an opportunity where you could PR a non-breaking change directly into 2.x and make the breaking change in main. Then it'll be usable sooner via a minor version, and the "corrected" version can just wait for whenever we cut a 3.0.0

[camerondurham]

Thanks for the review @Xtansia, I accepted all suggestions and added an entry to the changelog.

[opensearch-trigger-bot[bot]]

The backport to 2.x 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.x 2.x
# Navigate to the new working tree
cd .worktrees/backport-2.x
# Create a new branch
git switch --create backport/backport-245-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 28e3d47a54c4fe1ce0a3647c872411602dc6b1e2
# Push it to GitHub
git push --set-upstream origin backport/backport-245-to-2.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-245-to-2.x.