Bug 1888233 - Disable building gtest in Thunderbird Rust builds temporarily. r=dandarnell

Until bug 1888234 is fixed.

Differential Revision: https://phabricator.services.mozilla.com/D205886

--HG--
extra : moz-landing-system : lando

taskcluster/ci/build/linux.yml

@@ -70,6 +70,7 @@ linux64-rust/opt:
         extra-config:
             extra_mozconfig_content:
                 - ac_add_options --enable-thunderbird-rust
+                - ac_add_options --disable-gtest-in-build
     use-sccache: true
     run-on-projects: ['comm-central']
     optimization:

taskcluster/ci/build/macosx.yml

@@ -107,6 +107,7 @@ macosx64-rust/opt:
         extra-config:
             extra_mozconfig_content:
                 - ac_add_options --enable-thunderbird-rust
+                - ac_add_options --disable-gtest-in-build
     use-sccache: true
     run-on-projects: ['comm-central']
     fetches:

taskcluster/ci/build/windows.yml

@@ -245,6 +245,7 @@ win64-rust/opt:
             mozconfig_platform: win64
             extra_mozconfig_content:
                 - ac_add_options --enable-thunderbird-rust
+                - ac_add_options --disable-gtest-in-build
     use-sccache: true
     run-on-projects: ['comm-central']
     optimization: