Add bulk, count, clear scroll, close PIT examples

[lcawl]

Relates to #2482

This PR adds examples and edits descriptions derived from https://www.elastic.co/guide/en/elasticsearch/reference/master/search-count.html, https://www.elastic.co/guide/en/elasticsearch/reference/master/point-in-time-api.html#close-point-in-time-api, https://www.elastic.co/guide/en/elasticsearch/reference/master/clear-scroll-api.html, https://www.elastic.co/guide/en/elasticsearch/reference/master/docs-bulk.html

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
bulk	🟢	445/445	463/463
clear_scroll	🟢	17/17	17/17
close_point_in_time	🟢	7/7	7/7
count	🟢	34/34	34/34

You can validate these APIs yourself by using the make validate target.

[szabosteve]

LGTM!

[github-actions]

Following you can find the validation results for the APIs you have changed.

API	Status	Request	Response
bulk	🟢	445/445	463/463
clear_scroll	🟢	17/17	17/17
close_point_in_time	🟢	7/7	7/7
count	🟢	34/34	34/34

You can validate these APIs yourself by using the make validate target.

[github-actions]

The backport to 8.17 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-8.17 8.17
# Navigate to the new working tree
cd .worktrees/backport-8.17
# Create a new branch
git switch --create backport-3510-to-8.17
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 4eeb458b9a88fc34d904279c9fdeb4c65a370a66
# Push it to GitHub
git push --set-upstream origin backport-3510-to-8.17
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-8.17

Then, create a pull request where the base branch is 8.17 and the compare/head branch is backport-3510-to-8.17.

[lcawl]

💚 All backports created successfully

Status	Branch	Result
✅	8.17

Questions ?

Please refer to the Backport tool documentation