Size verifier fix 2 (#8740)

* Fixes to make SizeVerifier work.

In particular change all the places in the Flatbuffers library
and generated code that were using `Verifier` to instead use
`VerifierTemplate<TrackBufferSize>` and wrap them all inside
`template <bool TrackBufferSize = false>`.

Also add unit tests for SizeVerifier.

* Format using `sh scripts/clang-format-git.sh`

* Use `B` rather than `TrackBufferSize` for the name of the template parameter.

* Update generated files.

src/idl_parser.cpp

@@ -4352,8 +4352,9 @@ bool Parser::Deserialize(const uint8_t* buf, const size_t size) {
     else
       size_prefixed = true;
   }
-  auto verify_fn = size_prefixed ? &reflection::VerifySizePrefixedSchemaBuffer
-                                 : &reflection::VerifySchemaBuffer;
+  auto verify_fn = size_prefixed
+                       ? &reflection::VerifySizePrefixedSchemaBuffer<false>
+                       : &reflection::VerifySchemaBuffer<false>;
   if (!verify_fn(verifier)) {
     return false;
   }