go.mod: go get github.com/hashicorp/terraform-svchost@v0.1.1

[apparentlymart]

This includes a change to make svchost.Disco and the caching credentials source both safe for concurrent calls.

This fixes #33333.

[apparentlymart]

I've marked this as a draft because this upgrade also forced upgrading a few of our other dependencies and so I need to go see what has changed in those and whether those upgrades will have any other impacts on Terraform. I'll mark this as ready to review once I've reached a conclusion on that, and hopefully also request a v1.5 backport if those upstream changes are low-risk.

[apparentlymart]

• golang.org/x/net changes: Only affects the "html" package, which we don't use in Terraform. (We use this module for its IDNA and HTTP proxy functionality.)
• golang.org/x/oauth2 changes: Seems to primarily affect the Google-specific package, which we don't use in Terraform Core. I worried that the gcs backend might use the Google-specific parts, but it seems not; it only imports the root package.
• golang.org/x/sys changes: We use only the "windows" package, and that is affected by two of the upstream changes but it doesn't seem to change the parts we depend on. (We use this for atomically renaming files using MoveFileEx, and for activating the VT features of the Windows console using GetConsoleMode and SetConsoleMode.)
• golang.org/x/term changes: This hasn't actually changed itself; it just depends on golang.org/x/sys v0.6.0 now itself.

All of these seem low-risk to me, so I'm going to propose this for v1.5 backport.

[github-actions]

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[github-actions]

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