Auto merge of #62179 - alexcrichton:less-travis-appveyor, r=pietroalbini

ci: Move most builders to Azure Pipelines

This commit disables all builders on Travis and almost all builders on
AppVeyor now that they're all running on Azure Pipelines. There is one
remaining builder on AppVeyor which hasn't been migrated yet due to a
test failure on Azure, which we'll be debugging soon. One remaining
builder is left on Travis which is the tools builder whenever a
submodule is changed, but we'll probably turn that off soon since it's
just for PRs.

The other major change in this PR is that the auto builders on Azure are
now configured with "real" prod credentials which should cause them to
publish all artifacts into the official CI buckets.

diff --git a/src/tools/clippy b/src/tools/clippy
index 8c80b65f10213c6e5f4c6d8113e8f8c9477af568..e3cb40e4f7e566ffe260b2b9d606485c7c22d642 160000 (submodule)
--- a/src/tools/clippy
+++ b/src/tools/clippy
@@ -1 +1 @@
-Subproject commit 8c80b65f10213c6e5f4c6d8113e8f8c9477af568
+Subproject commit e3cb40e4f7e566ffe260b2b9d606485c7c22d642