Revert "[clangd] Make lit tests work with the internal shell"

This reverts commit 9c414c4.

This one is causing buildbot failures too at CMake configure time:
1. https://lab.llvm.org/buildbot/#/builders/193/builds/12452

Author: boomanaiden154

clang-tools-extra/clangd/test/CMakeLists.txt

@@ -3,7 +3,6 @@ set(CLANGD_TEST_DEPS
   ClangdTests
   clangd-indexer
   split-file
-  IndexBenchmark
   )
 
 if(CLANGD_BUILD_XPC)

clang-tools-extra/clangd/test/include-cleaner-batch-fix.test

@@ -7,9 +7,7 @@
 # RUN: cp -r %S/Inputs/include-cleaner %t/include
 # RUN: echo '-I%t/include' > %t/compile_flags.txt
 # Create a config file enabling include-cleaner features.
-# RUN: echo 'Diagnostics:' > %t/clangd/config.yaml
-# RUN: echo '  UnusedIncludes: Strict' >> %t/clangd/config.yaml
-# RUN: echo '  MissingIncludes: Strict' >> %t/clangd/config.yaml
+# RUN: echo $'Diagnostics:\n  UnusedIncludes: Strict\n  MissingIncludes: Strict' >> %t/clangd/config.yaml
 
 # RUN: env XDG_CONFIG_HOME=%t clangd -lit-test -enable-config --compile-commands-dir=%t < %s | FileCheck -strict-whitespace %s
 {"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{"workspace":{"workspaceEdit":{"documentChanges":true, "changeAnnotationSupport":{"groupsOnLabel":true}}}},"trace":"off"}}

clang-tools-extra/clangd/test/index-tools.test

@@ -1,6 +1,6 @@
-# Paths are not constructed correctly for the test to run on Windows.
-# UNSUPPORTED: system-windows
 # RUN: clangd-indexer %p/Inputs/BenchmarkSource.cpp -- -I%p/Inputs > %t.index
-# RUN: %clangd-benchmark-dir/IndexBenchmark %t.index %p/Inputs/requests.json --benchmark_min_time=0.01
+# FIXME: By default, benchmarks are excluded from the list of default targets hence not built. Find a way to depend on benchmarks to run the next command.
+# REQUIRES: shell
+# RUN: if [ -f %clangd-benchmark-dir/IndexBenchmark ]; then %clangd-benchmark-dir/IndexBenchmark %t.index %p/Inputs/requests.json --benchmark_min_time=0.01 ; fi
 # Pass invalid JSON file and check that IndexBenchmark fails to parse it.
-# RUN: not %clangd-benchmark-dir/IndexBenchmark %t.index %t --benchmark_min_time=0.01
+# RUN: if [ -f %clangd-benchmark-dir/IndexBenchmark ]; then not %clangd-benchmark-dir/IndexBenchmark %t.index %t --benchmark_min_time=0.01 ; fi

clang-tools-extra/clangd/test/system-include-extractor.test

@@ -5,8 +5,7 @@
 
 # Create a bin directory to store the mock-driver and add it to the path
 # RUN: mkdir -p %t.dir/bin
-# RUN: %python -c "print(__import__('os').environ['PATH'])" > %t.path
-# RUN: export PATH=%t.dir/bin:%{readfile:%t.path}
+# RUN: export PATH=%t.dir/bin:$PATH
 # Generate a mock-driver that will print %temp_dir%/my/dir and
 # %temp_dir%/my/dir2 as include search paths.
 # RUN: echo '#!/bin/sh' >> %t.dir/bin/my_driver.sh