Update integration name to Elastic Defend

[kevinlog]

Change Summary

Part of this ticket: https://github.com/elastic/security-team/issues/4759

Update the integration name to Elastic Defend.

Made the package and ran it locally:

No mapping changes in this PR.

Release Target

8.5

Q/A

For mapping changes:

• I ran make after making the schema changes, and committed all changes

[pzl]

lgtm

[elasticmachine]

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• Start Time: 2022-08-25T17:24:54.887+0000

• Duration: 8 min 42 sec

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