[clang plugin] Remove plugin test actual output

tools/clang/plugins/tests/test.py automatically generates '*.txt.actual'
on test failure. These files should not be committed.
- Remove blink_discouraged_type.txt
- Add the pattern to .gitignore

Change-Id: I9f2824eeda6c74c89afa4c8299aeb65d6fc98e02
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4511383
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Mikihito Matsuura <mikt@google.com>
Cr-Commit-Position: refs/heads/main@{#1140724}

.gitignore

@@ -318,6 +318,7 @@ vs-chromium-project.txt
 /tools/.bisect-builds-cache.json
 /tools/cygprofile/*.wprgo
 /tools/clang/dsymutil/bin/dsymutil
+/tools/clang/plugins/tests/*.txt.actual
 /tools/distcc
 /tools/gn/bin/linux
 /tools/gn/bin/mac

tools/clang/plugins/tests/blink_discouraged_type.txt.actual

@@ -1,23 +0,0 @@
-In file included from blink_discouraged_type.cpp:5:
-./third_party/blink/renderer/discouraged_type.h:31:20: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-  std::vector<int> v1;
-                   ^
-./third_party/blink/renderer/discouraged_type.h:36:21: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-  nested::IntVector v2a;
-                    ^
-./third_party/blink/renderer/discouraged_type.h:37:15: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-  FloatVector v2b;
-              ^
-./third_party/blink/renderer/discouraged_type.h:38:16: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-  FloatVector2 v2c;
-               ^
-./third_party/blink/renderer/discouraged_type.h:41:21: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-  std::vector<char> v_array[4][4];
-                    ^
-./third_party/blink/renderer/discouraged_type.h:73:22: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-    std::vector<int> v;
-                     ^
-./third_party/blink/renderer/discouraged_type.h:82:18: warning: [blink-style] 'std::vector' is discouraged for data members in blink renderer. Use WTF::Vector if possible. If the usage is necessary, add ALLOW_DISCOURAGED_TYPE(reason) to the data member or the type alias to suppress this message.
-  std::vector<T> v1;
-                 ^
-7 warnings generated.