caesarxuchao: Automated cherry pick of #104985: Aggregator uses the regular transport even if the request #105475: apiserver aggregator upgrade unit test #105582: Verifying the auth headers are set for upgraded aggregated

JobBuild
105641
10-12 18:43
142a56d8
10-12 18:42
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pull-kubernetes-unit 1448555049272741888 1447996001502629888
pull-kubernetes-verify 1448555041983041536 1447995999892017152
pull-kubernetes-verify-govet-levee 1448555043660763136 1447995999917182976