[Backport] [2.x] Bump com.azure:azure-core-http-netty from 1.15.4 to 1.15.5 in /plugins/repository-azure (#16311)

[Backport] [2.x] Bump com.azure:azure-core-http-netty from 1.15.4 to 1.15.5 in /plugins/repository-azure (#16311) #8558