Bug 1689734 - Further restrict ScriptPreloader use of CompileOptions. r=kmag,arai

The JS CompileOptions used to load cache entries must be consistent with
eachother to avoid subtle and serious bugs. This adds additional checks and
makes more consistent use of `FillCompileOptionsForCachedScript`.

This patch is a refactoring and should not change any behaviour.

Depends on D103515

Differential Revision: https://phabricator.services.mozilla.com/D103516

dom/base/nsFrameMessageManager.cpp

@@ -1260,7 +1260,6 @@ void nsMessageManagerScriptExecutor::TryCacheLoadAndCompileScript(
   ScriptPreloader::FillCompileOptionsForCachedScript(options);
   options.setFileAndLine(url.get(), 1);
   options.setNonSyntacticScope(true);
-  options.setSourceIsLazy(true);
 
   JS::Rooted<JSScript*> script(cx);
   script =