Bug 1466689 - Perform macOS builds on gecko-{L}-b-linux worker type; r=dustin,mshal

The gecko-{L}-b-macosx64 worker types are really Linux (macOS builds are
cross-compiled). These worker types are essentially identical to their
gecko-{L}-b-linux counterparts.

I don't see a compelling reason to maintain separate worker types for
these builds other than maybe cost accounting (worker types are tagged
in AWS land and these tags can be more easily broken out for billing
analysis). But I don't think any important systems are relying on
this "feature."

So let's move the macOS build tasks to the gecko-{L}-b-linux workers.

MozReview-Commit-ID: 67bArn6IG9T

--HG--
extra : rebase_source : 4de6bf450e7d0d982a770ca8a92e1ac1982fa228

taskcluster/ci/build/macosx.yml

@@ -7,7 +7,7 @@ macosx64/debug:
         platform: osx-cross/debug
         symbol: B
         tier: 1
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -40,7 +40,7 @@ macosx64/opt:
         platform: osx-cross/opt
         symbol: B
         tier: 1
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -71,7 +71,7 @@ macosx64-asan-fuzzing/opt:
     treeherder:
         platform: osx-cross/asan
         symbol: Bof
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -105,7 +105,7 @@ macosx64-dmd/opt:
         platform: osx-10-10-dmd/opt
         symbol: Bdmd
         tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -145,7 +145,7 @@ macosx64-devedition-nightly/opt:
         platform: osx-cross-devedition/opt
         symbol: N
         tier: 1
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -180,7 +180,7 @@ macosx64-noopt/debug:
         platform: osx-cross-noopt/debug
         symbol: B
         tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -215,7 +215,7 @@ macosx64-add-on-devel/opt:
         platform: osx-cross-add-on-devel/opt
         symbol: B
         tier: 2
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -254,7 +254,7 @@ macosx64-nightly/opt:
         platform: osx-cross/opt
         symbol: N
         tier: 1
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 36000
         env:
@@ -287,7 +287,7 @@ macosx64-ccov/debug:
         platform: osx-cross-ccov/debug
         symbol: B
         tier: 1
-    worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+    worker-type: aws-provisioner-v1/gecko-{level}-b-linux
     worker:
         max-run-time: 5400
         env:

taskcluster/ci/searchfox/kind.yml

@@ -54,7 +54,7 @@ jobs:
             job-name: macosx64-searchfox-debug
         treeherder:
             platform: osx-cross/debug
-        worker-type: aws-provisioner-v1/gecko-{level}-b-macosx64
+        worker-type: aws-provisioner-v1/gecko-{level}-b-linux
         worker:
             max-run-time: 36000
             env: