Correct --use-strategies=false

[mikeV02]

There is a type where UseStrategiesFlagCore is repeated and t3c does not allow to use --use-strategy=false

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Which Traffic Control components are affected by this PR?

• Traffic Control Cache Config (t3c, formerly ORT)

What is the best way to verify this PR?

Try using --use-strategies=false and the tool will give an error saying the value "false" is invalid

If this is a bugfix, which Traffic Control versions contained the bug?

master 7.0.x 8.0.x

PR submission checklist

• [ ] This PR has tests
• [ ] This PR has documentation
• [x] This PR has a CHANGELOG.md entry
• [x] This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)