clangd-ubuntu-tsan: Fix arguments passed to CMake

The builds are currently failing:
http://lab.llvm.org:8014/#/builders/136/builds/5

Presumably, the problem is that extra `"` make it into the values passed to
CMake somehow through the shell or invocation, and that causes unexpected
failures. The buildbot configurations around clangd-ubuntu-tsan never enclose
values in additional `"` so this patch also makes it more coherent with the
rest of existing code.

Differential Revision: https://reviews.llvm.org/D91566
diff --git a/buildbot/osuosl/master/config/builders.py b/buildbot/osuosl/master/config/builders.py
index 13be4e0..ec6cf51 100644
--- a/buildbot/osuosl/master/config/builders.py
+++ b/buildbot/osuosl/master/config/builders.py
@@ -1894,11 +1894,11 @@
          depends_on_projects=['"clang;clang-tools-extra'],
          checks=['check-clangd'],
          extra_configure_args=[
-             '-DLLVM_CCACHE_BUILD="ON"',
-             '-DLLVM_USE_SANITIZER="Thread"',
-             '-DCMAKE_BUILD_TYPE="Release"',
-             '-DCLANGD_ENABLE_REMOTE="ON"',
-             '-DLLVM_ENABLE_ASSERTIONS="ON"',
+             '-DLLVM_CCACHE_BUILD=ON',
+             '-DLLVM_USE_SANITIZER=Thread',
+             '-DCMAKE_BUILD_TYPE=Release',
+             '-DCLANGD_ENABLE_REMOTE=ON',
+             '-DLLVM_ENABLE_ASSERTIONS=ON',
          ])},