Memcached TSDB Enablement

[agithomas]

• Enhancement

What does this PR do?

This PR enables TSDB by default for the memcached package.

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.

Related issues

• Closes [ Memcached ] TSDB enablement #6925

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• Start Time: 2023-07-17T16:16:21.020+0000

• Duration: 14 min 10 sec

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Test	Results
Failed	0
Passed	4
Skipped	0
Total	4

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 13.636
Classes	100.0% (0/0)	💚 13.636
Methods	75.0% (3/4)	👎 -8.333
Lines	100.0% (0/0)	💚 14.997
Conditionals	100.0% (0/0)	💚

[lalit-satapathy]

LGTM

[elasticmachine]

Package memcached - 1.2.0 containing this change is available at https://epr.elastic.co/search?package=memcached