Rename "Symbol"-named embedded fonts to avoid Windows substitution

[calixteman]

Edge on Windows substitutes the system Symbol font for any embedded font
whose name table identifies it as "Symbol"/"SymbolMT", ignoring the
embedded glyphs and mis-rendering e.g. the bullet character as Greek xi.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.42%. Comparing base (1cb14a0) to head (c9cb51c).
⚠️ Report is 18 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #21326   +/-   ##
=======================================
  Coverage   81.42%   81.42%           
=======================================
  Files         257      257           
  Lines       65351    65357    +6     
=======================================
+ Hits        53209    53218    +9     
+ Misses      12142    12139    -3     

Flag	Coverage Δ
fonttest	9.11% <50.00%> (+<0.01%)	⬆️
integrationtest	67.00% <100.00%> (+<0.01%)	⬆️
unittest	56.87% <50.00%> (+<0.01%)	⬆️
unittestcli	56.06% <50.00%> (-0.02%)	⬇️

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[calixteman]

It's an attempt to fix #21303.
I can't reproduce locally, so @janekh, if you could test in the viewer I'll generate, it'd be nice.

/botio-linux preview

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Received

Command cmd_preview from @calixteman received. Current queue size: 0

Live output at: http://54.241.84.105:8877/a5c452ddf6581a0/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Success

Full output at http://54.241.84.105:8877/a5c452ddf6581a0/output.txt

Total script time: 1.19 mins

Published

• Viewer: http://54.241.84.105:8877/a5c452ddf6581a0/web/viewer.html
• Viewer (legacy): http://54.241.84.105:8877/a5c452ddf6581a0/legacy/web/viewer.html

[janekh]

Unfortunately, this one PC still displays the bullets wrong.

[calixteman]

/botio-linux preview

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Received

Command cmd_preview from @calixteman received. Current queue size: 0

Live output at: http://54.241.84.105:8877/5255318da14fde2/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Success

Full output at http://54.241.84.105:8877/5255318da14fde2/output.txt

Total script time: 1.18 mins

Published

• Viewer: http://54.241.84.105:8877/5255318da14fde2/web/viewer.html
• Viewer (legacy): http://54.241.84.105:8877/5255318da14fde2/legacy/web/viewer.html

[calixteman]

@janekh can you try with the viewer I've just created ?

[janekh]

Still no change. Is there anything I can check on this specific PC to help track down this thing?