Revert of Repurpose Release_Developer BUILDTYPE and remove SK_DEVELOPER. (patchset #2 id:20001 of https://codereview.chromium.org/1927583002/ )

Reason for revert:
still blocking DEPS roll

Original issue's description:
> Repurpose Release_Developer BUILDTYPE and remove SK_DEVELOPER.
>
> The Release_Developer build type is now used to build Skia with
> release level optimizations but still enable SK_DEBUG. This in turn
> means that SkASSERTS and SkRTConf are available in this mode.
>
> Further we can then remove SK_DEVELOPER as a define as it is true
> iff SK_DEBUG is true.
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1927583002
> DOCS_PREVIEW= https://skia.org/?cl=1927583002
>
> Committed: https://skia.googlesource.com/skia/+/48d6f88479e72efaf9b9d8f9c0769acb1ba773db

TBR=bungeman@gmail.com,bungeman@google.com,benjaminwagner@google.com,djsollen@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/1918253006
diff --git a/tests/RuntimeConfigTest.cpp b/tests/RuntimeConfigTest.cpp
index b863ee1..d40a4f0 100644
--- a/tests/RuntimeConfigTest.cpp
+++ b/tests/RuntimeConfigTest.cpp
@@ -16,12 +16,12 @@
     REPORTER_ASSERT(reporter, 1 == c_RTConfTestVariable);
 
     SK_CONF_SET("test.utils.rtconf.testVariable", 2);
-#ifdef SK_DEBUG
+#ifdef SK_DEVELOPER
     REPORTER_ASSERT(reporter, 2 == c_RTConfTestVariable);
-#else  // not SK_DEBUG
-    // Can not change RTConf variables in SK_RELEASE.
+#else  // not SK_DEVELOPER
+    // Can not change RTConf variables in Release.
     REPORTER_ASSERT(reporter, 1 == c_RTConfTestVariable);
-#endif  // SK_DEBUG
+#endif  // SK_DEVELOPER
 
     // This should not give a warning.
     SK_CONF_TRY_SET("test.utils.rtconf.nonexistentVariable", 7);