runtime: ignore error returned by PowerRegisterSuspendResumeNotification

[goproxies]

It appears that PowerRegisterSuspendResumeNotification is not supported
when running inside Docker - see issues golang#35447, golang#36557 and golang#37149.

Our current code relies on error number to determine Docker environment.
But we already saw PowerRegisterSuspendResumeNotification return
ERROR_FILE_NOT_FOUND, ERROR_INVALID_PARAMETERS and ERROR_ACCESS_DENIED
(see issues above). So this approach is not sustainable.

Just ignore PowerRegisterSuspendResumeNotification returned error.

Fixes golang#37149

Change-Id: I2beba9d45cdb8c1efac5e974e747827a6261915a
Reviewed-on: https://go-review.googlesource.com/c/go/+/219657
Run-TryBot: Alex Brainman [email protected]
TryBot-Result: Gobot Gobot [email protected]
Reviewed-by: Austin Clements [email protected]
Reviewed-by: Jason A. Donenfeld [email protected]

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