Bug 1712751 - Disable sccache on ccov builds. r=firefox-build-system-reviewers,andi DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D129135

taskcluster/ci/build/linux.yml

@@ -1159,7 +1159,7 @@ linux64-asan-fuzzing-ccov/opt:
         mozconfig-variant: asan-fuzzing-ccov
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
+    use-sccache: false
     fetches:
         toolchain:
             - linux64-binutils
@@ -1201,7 +1201,7 @@ linux64-fuzzing-ccov/opt:
         mozconfig-variant: fuzzing-ccov
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
+    use-sccache: false
     fetches:
         toolchain:
             - linux64-binutils
@@ -1525,7 +1525,7 @@ linux64-ccov/opt:
         mozconfig-variant: code-coverage-opt
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
+    use-sccache: false
     fetches:
         toolchain:
             - linux64-binutils
@@ -1567,7 +1567,7 @@ linux64-ccov/debug:
         mozconfig-variant: code-coverage-debug
         tooltool-downloads: public
         need-xvfb: true
-    use-sccache: true
+    use-sccache: false
     fetches:
         toolchain:
             - linux64-binutils

taskcluster/ci/build/macosx.yml

@@ -664,7 +664,7 @@ macosx64-ccov/opt:
         custom-build-variant-cfg: code-coverage-opt
         mozconfig-variant: code-coverage
     run-on-projects: ['mozilla-central']
-    use-sccache: true
+    use-sccache: false
     fetches:
         toolchain:
             - linux64-cctools-port

taskcluster/ci/build/windows.yml

@@ -975,7 +975,7 @@ win64-ccov/opt:
             - builds/taskcluster_sub_win64/ccov_opt.py
         mozconfig-variant: code-coverage
     run-on-projects: ['mozilla-central']
-    use-sccache: true
+    use-sccache: false
     fetches:
         toolchain:
             - win64-clang