Revert "Disable Win32 Release MSVC builders, as they fail on Windows 10"

This reverts commit 2d8465723ef61006704a2ed01a24c6a0f2b62ed9.

Reason for revert: Bots were changed back to Windows 7

Original change's description:
> Disable Win32 Release MSVC builders, as they fail on Windows 10
> 
> Bug: chromium:943463
> Change-Id: I2d4273fc28fae904de10e96f48d0a82857aa7ea7
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128572
> Reviewed-by: Artem Titarenko <artit@webrtc.org>
> Commit-Queue: Oleh Prypin <oprypin@webrtc.org>

Bug: chromium:943463
Change-Id: I8b5b4182a268d903bff4450cbedcf7a57a2e9f3a
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128605
Reviewed-by: Artem Titarenko <artit@webrtc.org>
Commit-Queue: Artem Titarenko <artit@webrtc.org>
diff --git a/commit-queue.cfg b/commit-queue.cfg
index bb43ed8..3031baf 100644
--- a/commit-queue.cfg
+++ b/commit-queue.cfg
@@ -188,6 +188,9 @@
       builders: <
         name: "webrtc/try/win_x86_msvc_dbg"
       >
+      builders: <
+        name: "webrtc/try/win_x86_msvc_rel"
+      >
       retry_config: <
         single_quota: 1
         global_quota: 2