fix(experiments): use getters to prevent toc/tou limitations #2015
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Previously, the value of experiment flags were read from the environment during the
init()function, making it impossible to programmatically enable or disable flags when usingtaskas a package (#2014). This patch makes all experiments getters that read from the environment at time of access, not at time of initialization.A more flexible solution might be to expose
experimentsto theExecutorand allow values to be overridden directly.