Support Elasticsearch 8.x

[pmuls99]

Which problem is this PR solving?

• Resolves Elasticsearch 8.x support #3571

Description of the changes

• Added index templates for esv8
• Added a esv8 client to handle the put index template request that is not currently possible by olivere/elastic
• After these changes are merged , users no more need to use create.index-templates= false unless they want to add their custom index templates and force the es.version = 7

[yurishkuro]

in the unit tests the mocks are unhappy about unexpected GetVersion call

in the CIT, ES8 complains about --env "xpack.monitoring.enabled=false" param passed from here: scripts/es-integration-test.sh

Unknown setting [xpack.monitoring.enabled] did you mean any of [xpack.profiling.enabled, xpack.monitoring.templates.enabled]?

You will need to change this flag for v8

[yurishkuro]

this PR https://github.com/jaegertracing/jaeger/pull/4512/files had an example how to deal with the deprecated CLI flag. But I think we should not just remove the flag, we should change it for v8 to whatever the replacement is.

[pmuls99]

this PR https://github.com/jaegertracing/jaeger/pull/4512/files had an example how to deal with the deprecated CLI flag. But I think we should not just remove the flag, we should change it for v8 to whatever the replacement is.

So basically this whole set of flags have been deprecated since the version 7.16(https://www.elastic.co/guide/en/elasticsearch/reference/current/monitoring-settings.html).

[yurishkuro]

if (( major_version < 8 )); then
    params+=(--env "xpack.monitoring.enabled=false")
else
    params+=(--env "xpack.monitoring.collection.enabled=false")
fi

[yurishkuro]

please make sure PR description reflects all the changes, and explain why they are needed (especially the priority)

[yurishkuro]

run make fmt

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (9cd9fdb) 96.44% compared to head (8f9f5c6) 96.44%.

Files	Patch %	Lines
pkg/es/client/index_client.go	75.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4829      +/-   ##
==========================================
- Coverage   96.44%   96.44%   -0.01%     
==========================================
  Files         304      304              
  Lines       18049    18092      +43     
==========================================
+ Hits        17407    17448      +41     
- Misses        508      511       +3     
+ Partials      134      133       -1     

Flag	Coverage Δ
unittests	96.44% <95.83%> (-0.01%)	⬇️

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[yurishkuro]

Please squash commits and sign

[yurishkuro]

great job @pmuls99 ! 🎉

[adnankobir]

@yurishkuro when can we expect the next release?

[yurishkuro]

within a week - cc @albertteoh