fix(elasticsearch-logger): add compatibility headers

[lakshya8066]

Description

1. Add compatibility headers to ensure smooth transition from version 7.x to 8.x
2. update the elasticsearch in test env

Fixes #8647

Checklist

• I have explained the need for this PR and the problem it solves
• I have explained the changes or the new features added to this PR
• I have added tests corresponding to this change
• I have updated the documentation to reflect this change
• I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

[pottekkat]

Could you check the failing test cases? It is because of this change.

[monkeyDluffy6017]

This PR changes the version of the elastic search used for testing the elasticsearch-logger plugin to version 8.11.3

I didn't see this?

[lakshya8066]

oh my bad, initially this PR was supposed to change the version as well but I am getting errors on upgrading the version. I don't know how to solve the errors.
So for now, I am just adding the headers. I will change the version as soon as I detect the bug

[monkeyDluffy6017]

The pr seems not ready if you don't upgrade the elasticsearch

[shreemaan-abhishek]

@gaoxingliang please review if you can.

[Revolyssup]

LGTM