Refactors loadFont for translateFont be async

[yurydelendik]

translateFont is using CMapFactory.create which is sync network bound operation, this PR is preparing loadFont for that translateFont be async. Also, fixes type3 fonts to avoid sending operatorList with each character -- the bug surfaced when the loadFont promise was introduced, so cannot disconnect those without introducing the performance regression first.

[Snuffleupagus]

/botio test

[pdfjsbot]

From: Bot.io (Linux)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://107.21.233.14:8877/16721fbf358dff3/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Received

Command cmd_test from @Snuffleupagus received. Current queue size: 0

Live output at: http://107.22.172.223:8877/05b13652533804d/output.txt

[pdfjsbot]

From: Bot.io (Windows)

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Failed

Full output at http://107.22.172.223:8877/05b13652533804d/output.txt

Total script time: 2.70 mins

• Font tests: FAILED
• Unit tests: Passed
• Regression tests: FAILED

Image differences available at: http://107.22.172.223:8877/05b13652533804d/reftest-analyzer.html#web=eq.log

[yurydelendik]

/botio-windows test

[pdfjsbot]

From: Bot.io (Windows)

---

Received

Command cmd_test from @yurydelendik received. Current queue size: 0

Live output at: http://107.22.172.223:8877/343506f0b7a4e36/output.txt

[pdfjsbot]

From: Bot.io (Linux)

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Success

Full output at http://107.21.233.14:8877/16721fbf358dff3/output.txt

Total script time: 26.66 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: Passed

[pdfjsbot]

From: Bot.io (Windows)

---

Success

Full output at http://107.22.172.223:8877/343506f0b7a4e36/output.txt

Total script time: 24.38 mins

• Font tests: Passed
• Unit tests: Passed
• Regression tests: Passed

[Snuffleupagus]

Looks good to me; thank you for the patch!