Enable "unused value checker"

[serras]

This still requires 2.3.0-Beta2, but it's good to be forward-looking to these changes.

[github-actions[bot]]

Kover Report

File	Coverage [47.46%]
arrow-libs/core/arrow-autoclose/src/commonMain/kotlin/arrow/AutoCloseScope.kt	100.00%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Either.kt	97.44%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Iterable.kt	29.04%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/NonEmptyList.kt	73.68%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/NonEmptySet.kt	65.96%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/Option.kt	80.65%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/raise/Builders.kt	96.47%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/raise/Fold.kt	100.00%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/raise/Raise.kt	95.83%
arrow-libs/core/arrow-core/src/commonMain/kotlin/arrow/core/raise/RaiseAccumulate.kt	24.24%
arrow-libs/core/arrow-core/src/jsMain/kotlin/arrow/core/raise/CancellationExceptionNoTrace.kt	100.00%
arrow-libs/core/arrow-exception-utils/src/androidAndJvmMain/kotlin/arrow/core/NonFatal.kt	100.00%
arrow-libs/core/arrow-exception-utils/src/commonMain/kotlin/arrow/core/NonFatal.kt	100.00%
arrow-libs/core/arrow-exception-utils/src/commonMain/kotlin/arrow/core/ThrowableUtils.kt	100.00%
arrow-libs/core/arrow-exception-utils/src/commonMain/kotlin/arrow/core/nonFatalOrThrow.kt	100.00%
arrow-libs/core/arrow-exception-utils/src/nonJvmMain/kotlin/arrow/core/NonFatal.kt	100.00%
arrow-libs/fx/arrow-collectors/src/commonMain/kotlin/arrow/collectors/Collectors.kt	55.88%
arrow-libs/fx/arrow-fx-coroutines/src/commonMain/kotlin/arrow/fx/coroutines/Bracket.kt	88.46%
arrow-libs/fx/arrow-fx-coroutines/src/commonMain/kotlin/arrow/fx/coroutines/CyclicBarrier.kt	80.95%
arrow-libs/fx/arrow-fx-coroutines/src/commonMain/kotlin/arrow/fx/coroutines/Race3.kt	90.00%
arrow-libs/fx/arrow-fx-coroutines/src/commonMain/kotlin/arrow/fx/coroutines/Racing.kt	100.00%
arrow-libs/fx/arrow-fx-coroutines/src/commonMain/kotlin/arrow/fx/coroutines/Resource.kt	81.03%
arrow-libs/fx/arrow-fx-stm/src/commonMain/kotlin/arrow/fx/stm/TVar.kt	73.08%
arrow-libs/fx/arrow-fx-stm/src/commonMain/kotlin/arrow/fx/stm/internal/Hamt.kt	87.80%
arrow-libs/integrations/arrow-core-jackson/src/main/kotlin/arrow/integrations/jackson/module/internal/ProductTypeSerializer.kt	100.00%
arrow-libs/integrations/arrow-core-jackson/src/main/kotlin/arrow/integrations/jackson/module/internal/UnionTypeSerializer.kt	91.67%
arrow-libs/integrations/arrow-raise-ktor-server/src/commonMain/kotlin/arrow/raise/ktor/server/routing/routing.kt	9.52%
arrow-libs/integrations/arrow-raise-ktor-server/src/commonMain/kotlin/arrow/raise/ktor/server/routing/routingReceiving.kt	11.11%
arrow-libs/resilience/arrow-resilience/src/commonMain/kotlin/arrow/resilience/Saga.kt	95.35%

Total Project Coverage	47.18%

[serras]

I've ended up splitting the things related to exceptions and addSuppressed into its own small module, to avoid code duplication. @kyay10 would you mind having a look at it, since you recently touched that code?

The whole things is binary compatible: even though some things are moved to arrow-exceptions-utils, we still use the same package, and it's exported through arrow-core. So nobody needs to change anything (it they were doing so). For the one in arrow-autoclose, I've created a small wrapper re-exporting it.

[kyay10]

Ignore the nits, we can address them later! Just these 2 behaviour changes highlighted above are all I need.