@W-22187814: PDK stop iteration available as from pdk 1.8 and flex 1.12

[Pgarrett]

Writer's Quality Checklist

Before merging your PR, did you:

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[glenn-rodgers-sf]

Suggested change

	PDK Policies using stop iteration on support payload bodies of 1 MB. This feature is available since PDK version 1.8 and Flex Gateway 1.12.
	PDK Policies using stop iteration on support payload bodies of 1 MB.
	NOTE: Only Flex Gateways version 1.12.0 or later support stop interation.