[ci] Migrate CircleCI to Ruby 3.3, fix CI#1290

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iBotPeaches wants to merge 8 commits intofastlane:masterfrom

iBotPeaches:drop-ruby2.x

Commits on Oct 20, 2025

build: set gem location as vendor/bundle
iBotPeaches
committed

Commits on Nov 6, 2025

Commits on Nov 10, 2025

chore: test personal docker image
iBotPeaches
committed

Commits on Nov 11, 2025

build: upgrade to modern rubocop
iBotPeaches
committed

Commits on Mar 24, 2026

Merge remote-tracking branch 'origin/master' into drop-ruby2.x
iBotPeaches
committed

Commits on Apr 2, 2026

chore: align docker image between test/deploy
iBotPeaches
committed