[clang] [analyzer] Allow egraph rewriter not to open the generated HTML directly (PR #85515)

[Ella Ma via cfe-commits]

================
@@ -479,12 +479,15 @@ def add_raw_line(self, raw_line):
 # A visitor that dumps the ExplodedGraph into a DOT file with fancy HTML-based
 # syntax highlighing.
 class DotDumpVisitor:
-    def __init__(self, do_diffs, dark_mode, gray_mode, topo_mode, dump_dot_only):
+    def __init__(
+        self, do_diffs, dark_mode, gray_mode, topo_mode, dump_dot_only, dump_html_only
+    ):
----------------
Snape3058 wrote:

I used to consider merging these two options. But this would affect some test cases.
I am afraid of breaking some other places that I do not know, I hence added a new option in the first version.
If only the test cases will be affected, I can re-impl it in the merged way.

https://github.com/llvm/llvm-project/pull/85515