Roll engine 76a91d39b4b2..3f27c5724c1d (6 commits) (#36216)

https://github.com/flutter/engine/compare/76a91d39b4b2...3f27c5724c1d

git log 76a91d39b4b256ef95170ed2d93fccca3c0a0d49..3f27c5724c1d92c14f8353419dfc6cb40a063aa2 --no-merges --oneline
3f27c5724 Roll fuchsia/sdk/core/mac-amd64 from pU_n3ahOhH6HJhE4vs5pUR8cg5U22TItP_Ds_N2OXPIC to qFyiJ56_6XZ5fjNssdCk_vOtBHg4YdWAPNeMIAf07-gC (flutter/engine#9830)
eb4793abf Revert "Roll src/third_party/dart 24725a8559..cbaf890f88 (33 commits) (#9826)" (flutter/engine#9829)
9c54621fd bitcode (flutter/engine#9823)
e105a8982 Roll src/third_party/dart 24725a8559..cbaf890f88 (33 commits) (flutter/engine#9826)
2e83c4a35 Roll fuchsia/sdk/core/linux-amd64 from ehWVT9QJbC-vFMM6SkkQM9HJ9oITFCws7FC9JnrFq2gC to IPgI5Uh4rIZ4zNfAV1_ynC4dGmFLexAW1L9czHUyjowC (flutter/engine#9827)
418fe5b2d Document FontFeature class (flutter/engine#9808)

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bin/internal/engine.version

-76a91d39b4b256ef95170ed2d93fccca3c0a0d49
+3f27c5724c1d92c14f8353419dfc6cb40a063aa2