Upgrade freetype port from 2.6 to 2.13.3 (emscripten-core#22585)

Also, switch from a fork to using the upstream github repo. We had a
single patch in our fork:


emscripten-ports/FreeType@40a760c

However, this was upstreamed in:


freetype/freetype@2f4b740

This change is based on emscripten-core#18088.

Fixes: emscripten-core#22571

Author: sbc100

ChangeLog.md

@@ -20,6 +20,7 @@ See docs/process.md for more on how version tagging works.
 
 3.1.68 (in development)
 -----------------------
+- The freetype port was updated from v2.6 to v2.13.3. (#22585)
 
 3.1.67 - 09/17/24
 -----------------

test/browser/test_sdl2_ttf.png

@@ -2,15 +2,15 @@
 
 
 
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-+**+   *****   +
-+***  +**+**+  *
- ***+ ***+**+ +*
- +**+ *** *** +*
- +**++**+ +**+**
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+***   +***+   **
+***+  +****  +**
++**+  *****  +**
++**+ +**+**+ +**
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+ *** +** *** ***
+ +**+*** +**+***
+ +**+**+ +**+**+
+ +*****+ +*****+
+  *****   ***** 
+  +****   +***+ 
+  +***+   +***+