[cisco_ftd] Update ECS to 1.12

[marc-gr]

Automated PR.

Updates ECS to v1.12 and does the required changes to the package.

[elasticmachine]

Pinging @elastic/security-external-integrations (Team:Security-External Integrations)

[elasticmachine]

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Build stats

• Start Time: 2021-10-01T09:39:23.831+0000

• Duration: 16 min 8 sec

• Commit: 1a6cdc6

Test stats 🧪

Test	Results
Failed	0
Passed	17
Skipped	0
Total	17

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