dashboard,cmd/release: replace windows-arm64-aws with windows-arm64-10

This change removes the windows-arm64-aws buildlet and replaces all
usages with the windows-arm64-10 buildlet.

- Remove the known issue from the windows-arm64-10 buildlet, which has
been passing reliably.
- Enable tests during releases, and add a slowbot alias, as it's a much
faster buildlet.

Updates golang/go#46502
For golang/go#42604

Change-Id: Ib9f7c3d5391b01e303b43bbdad030b3f94147c5d
Reviewed-on: https://go-review.googlesource.com/c/build/+/331670
Trust: Alexander Rakoczy <alex@golang.org>
Run-TryBot: Alexander Rakoczy <alex@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
diff --git a/cmd/release/release.go b/cmd/release/release.go
index 39710eb..7c610a6 100644
--- a/cmd/release/release.go
+++ b/cmd/release/release.go
@@ -205,10 +205,10 @@
 		OS:      "windows",
 		Arch:    "arm64",
 		Race:    false, // Not supported as of 2021-06-01.
-		Builder: "windows-arm64-aws",
-
-		// TODO(golang.org/issue/46406, golang.org/issue/46502): Fix or skip failing tests,
-		// ensure the builder is fast enough to complete tests, then remove SkipTests here.
+		Builder: "windows-arm64-10",
+		// TODO(golang.org/issue/46406, golang.org/issue/46502): Fix
+		// or skip failing tests, ensure the builder is fast enough to
+		// complete tests, then remove SkipTests here.
 		SkipTests: true,
 	},
 	{