Switch JDK22+ on AIX to use OpenXL17-compatible labels

[sxa]

Switch the pipelines to ensure that the JDK22+ jobs on AIX are only run on the machines that support OpenXL17

@smlambert I'm going to let you have a veto on this - I've added openxl17 for the build machine and sw.os.aix.7_2TL5 for test - the existing label we're using for earlier machines is the same without the TL5 suffix.

FYI @suchismith1993
Ref: adoptium/temurin-build#3822 (comment)
This will allow us to enable further machines as planned in adoptium/infrastructure#3606
Part of adoptium/infrastructure#3208

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[andrew-m-leonard]

lgtm

[andrew-m-leonard]

@sxa Linter will hopefully pass if you merge in latest "master" change to move to [email protected]

[steelhead31]

LGTM