fix: remove elasticsearch x-pack apis

[shyim]

Description

Remove x-pack related apis

Issues Resolved

Fixes #137

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[codecov-commenter]

Codecov Report

Merging #139 (6ed274f) into main (87f41a8) will increase coverage by 0.14%. The diff coverage is n/a.

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@@             Coverage Diff              @@
##               main     #139      +/-   ##
============================================
+ Coverage     23.91%   24.06%   +0.14%     
+ Complexity     1935     1924      -11     
============================================
  Files           245      243       -2     
  Lines          6848     6807      -41     
============================================
  Hits           1638     1638              
+ Misses         5210     5169      -41     

Impacted Files	Coverage Δ
src/OpenSearch/Client.php	21.96% <ø> (+0.75%)	:arrow_up:

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[dblock]

@shyim your DCO is Signed-off-by: GitHub <noreply@github.com>, you should probably fix that.

[shyim]

I was lazy and used codespaces 😅

[pwnb0t]

Hey, I believe PIT is supported in OpenSearch: https://opensearch.org/docs/latest/search-plugins/point-in-time-api/

I ran a test with OpenSearch 2.5.0 and modified this line: https://github.com/opensearch-project/opensearch-php/pull/139/files#diff-cdef139ac055ca2db8ceb1529e5d0e91351a96909eee68dec4994ca1e71c13bcL33

from

return "/$index/_pit";

to:

return "/$index/_search/point_in_time";

as a quick test and it worked, yielding a result like:

Array
(
    [pit_id] => s5D9QAEZc3VibWlzc2lvbnMtdjAwMDEtaW5kZXgtMRZybjd0ajdlbVNlT3ctUkp1cXBRbV9BABZVLTBNSEQxX1JhU2ZRLWJyZW9nRGxBAAAAAAAAAAAKFkVqdjd0T1dXU002aVNjRklmQ1FYNlEBFnJuN3RqN2VtU2VPdy1SSnVxcFFtX0EAAA==
    [_shards] => Array
        (
            [total] => 1
            [successful] => 1
            [skipped] => 0
            [failed] => 0
        )

    [creation_time] => 1680039902345
)

[shyim]

I created a issue to readd it with all the API's https://github.com/opensearch-project/opensearch-php/issues/141