Memory leak in the upgrade action

[jkmw]

During the upgrade action we noticed a memory leak which only occurs when helm is used as a "library" and not as a cli tool.

Actually, there are two places:

1. The performUpgrade method waits at this point for the rChan, which is either filled by the releasingUpgrade or handleContext method. If the result comes from releasingUpgrade(), then handleContext() will wait until the context (ctx) is cancelled, which in most cases will never happen and keeps the routine running.

2. If ctx is indeed cancelled, handleContext() calls reportToPerformUpgrade() which fills the already consumed rChan. However, this is never read because the only consumer (performUpgrade()) has already returned; The routine remains running forever.

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Output of helm version:

version.BuildInfo{Version:"v3.7.1", GitCommit:"1d11fcb5d3f3bf00dbe6fe31b8412839a96b3dc4", GitTreeState:"clean", GoVersion:"go1.16.9"}

[zhanghaohao]

add #11805 as the same issue