[NFC] Fix the use of "strict" in subtypes.h (#5804)

Previously we incorrectly used "strict" to mean the immediate subtypes of a
type, when in fact a strict subtype of a type is any subtype excluding the type
itself. Rename the incorrect `getStrictSubTypes` to `getImmediateSubTypes`,
rename the redundant `getAllStrictSubTypes` to `getStrictSubTypes`, and rename
the redundant `getAllSubTypes` to `getSubTypes`. Fixing the capitalization of
"SubType" to "Subtype" is left as future work.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tools/fuzzing/fuzzing.cpp b/src/tools/fuzzing/fuzzing.cpp
index 3fb8c1ea5..7bfd07854 100644
--- a/src/tools/fuzzing/fuzzing.cpp
+++ b/src/tools/fuzzing/fuzzing.cpp
@@ -279,7 +279,7 @@ void TranslateToFuzzReader::setupHeapTypes() {
   // now, rather than lazily later.
   SubTypes subTypes(interestingHeapTypes);
   for (auto type : interestingHeapTypes) {
-    for (auto subType : subTypes.getStrictSubTypes(type)) {
+    for (auto subType : subTypes.getImmediateSubTypes(type)) {
       interestingHeapSubTypes[type].push_back(subType);
     }
     // Basic types must be handled directly, since subTypes doesn't look at