Stop testing macOS developer builds on x86_64 hardware

Our x86_64 pool is overloaded, so we need to reduce jobs.

As we're testing our packaging (universal) builds (both the one built
on x86_64 and the one built on arm64) on x86_64 for all macOS platforms
we support, it should be fine to remove the x86_64 tests of the
developer builds. These developer builds are still tested on arm64,
so the only test coverage we're losing on x86_64 are the subset of
tests that depend on QT_BUILD_INTERNAL.

Change-Id: Ia83964cc77d04ba796e3a59389ce000a51dcac93
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
(cherry picked from commit 760cf59266)
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

coin/platform_configs/macos.yaml

@@ -121,36 +121,18 @@ Configurations:
 
     # Test on all supported macOS versions (deployment targets)
 
-    -
-        Id: 'macos-11-x86_64-developer-build-tests'
-        Template: 'qtci-macos-11-x86_64-106'
-        Compiler: 'Clang'
-        Features: ['Sccache', 'TestOnly']
-        Platform dependency: 'macos-13-x86_64-developer-build'
     -
         Id: 'macos-11-arm64-developer-build-tests'
         Template: 'qtci-macos-11.0-arm64'
         Compiler: 'Clang'
         Features: ['TestOnly']
         Platform dependency: 'macos-13-arm64-developer-build'
-    -
-        Id: 'macos-12-x86_64-developer-build-tests'
-        Template: 'qtci-macos-12-x86_64-106'
-        Compiler: 'Clang'
-        Features: ['Sccache', 'TestOnly']
-        Platform dependency: 'macos-13-x86_64-developer-build'
     -
         Id: 'macos-12-arm64-developer-build-tests'
         Template: 'qtci-macos-12-arm64'
         Compiler: 'Clang'
         Features: ['TestOnly']
         Platform dependency: 'macos-13-arm64-developer-build'
-    -
-        Id: 'macos-13-x86_64-developer-build-tests'
-        Template: 'qtci-macos-13-x86_64-103'
-        Compiler: 'Clang'
-        Features: ['Sccache', 'TestOnly']
-        Platform dependency: 'macos-13-x86_64-developer-build'
     -
         Id: 'macos-13-arm64-developer-build-tests'
         Template: 'qtci-macos-13-arm64'