Fix for hang issue

[raghushantha]

PowerShell GetCommandInfo hangs when used in a multi threaded environment (with the same Runspace)

Fix is to put a lock around the usage.

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This change is

[daviwil]

Interesting, was this showing up in a particular rule? I wonder if this is why Script Analyzer was hanging in VS Code when I had all of the rules active?

[raghushantha]

Not specific to a single rule.
System.Management.Automation.CommandInvocationIntrinsics.GetCommand () would hang when multiple rules called this in a concurrent manner.

We were invoking this helper to discover commandinfo properties.

Need to followup with PowerShell team.

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Comments from the review on Reviewable.io

[kapilmb]

Reviewed 1 of 1 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from the review on Reviewable.io

[kapilmb]

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Review status: all files reviewed at latest revision, all discussions resolved, all commit checks successful.

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Comments from the review on Reviewable.io