Prepare repository for tag conversion function signature update

[michaelhtm]

Description of changes:
The To/FromACKTags function signatures are changing with the
next code-gen release. This PR aims to ensure custom code adapts as well.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[michaelhtm]

/retest

[michaelhtm]

/retest

[ack-prow]

@michaelhtm: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
elasticache-verify-attribution	24679d2	link	false	/test elasticache-verify-attribution

Full PR test history. Your PR dashboard.

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[rushmash91]

/lgtm

[ack-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: michaelhtm, rushmash91

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