[memcached_otel] add new content pack

[jakubgalecki0]

Proposed commit message

Add new content pack for memcached_otel

• 1 overview dashboard (KPIs, traffic, health, resources, instance detail)
• 5 alert rule templates (hit ratio, evictions, connections, CPU, throughput)
• 1 SLO template (get hit ratio 99.5% over 30 days)

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.
• I have verified that any added dashboard complies with Kibana's Dashboard good practices

Author's Checklist

• [ ]

How to test this PR locally

Related issues

Screenshots

[github-actions]

Vale Linting Results

Summary: 3 suggestions found

💡 Suggestions (3)

File	Line	Rule	Message
packages/memcached_otel/docs/README.md	3	Elastic.WordChoice	Consider using 'select, press, visits' instead of 'hit', unless the term is in the UI.
packages/memcached_otel/docs/README.md	17	Elastic.Semicolons	Use semicolons judiciously.
packages/memcached_otel/docs/README.md	68	Elastic.WordChoice	Consider using 'select, press, visits' instead of 'hit', unless the term is in the UI.

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[ishleenk17]

Mention the versions properly for collector and service

[ishleenk17]

Looks good!

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: 788a99c

History

• 💚 Build #39733 succeeded bdfa612
• 💚 Build #39481 succeeded a5f8243
• 💔 Build #39246 failed a3aafa5

[elastic-vault-github-plugin-prod]

Package memcached_otel - 0.1.0 containing this change is available at https://epr.elastic.co/package/memcached_otel/0.1.0/