[8.0](backport #28899) Move fips_enabled setting to AWS Common

[mergify]

This is an automatic backport of pull request #28899 done by Mergify.

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[elasticmachine]

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• Start Time: 2021-12-15T05:10:05.267+0000

• Duration: 160 min 24 sec

• Commit: b9a27e0

Test stats 🧪

Test	Results
Failed	0
Passed	28086
Skipped	3039
Total	31125

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[kaiyan-sheng]

/test

[kaiyan-sheng]

CI failure should be fixed by #29100.

[elasticmachine]

Pinging @elastic/integrations (Team:Integrations)