Optimize Temurin tool-cache fast path with lazy loading

[brunoborges]

Description:
This change optimizes the high-volume Temurin tool-cache-hit path by reducing eager startup work and overlapping dependency cache restore with local setup work. It does this by lazy-loading only the selected distribution installer, loading cache dependencies only when cache is configured, and starting restore early while still awaiting completion before action exit.

To preserve behavior and failure semantics, the setup flow now keeps Java/setup failures deterministic while still awaiting any in-flight cache restore to avoid unhandled promise rejections. Tests were updated to cover async distribution resolution, conditional module loading, and true concurrency in orchestration.

The setup bundle was regenerated after introducing dynamic imports. Because the setup output is now chunked, the release staging script was updated to include dist/setup/*.js.

Related issue:
Fixes: #1177

Check list:

• Ran npm run check locally (format, lint, build, test) and all checks pass.
• Mark if documentation changes are required.
• Mark if tests were added or updated to cover the changes.

[Copilot]

Pull request overview

This PR optimizes the common Temurin tool-cache-hit path by reducing eager module initialization and introducing concurrency between dependency cache restoration and local Java setup, while preserving deterministic failure behavior. It also regenerates the bundled dist/ output to support dynamic imports/code-splitting and updates tests to validate lazy loading and true overlap.

Changes:

• Make distribution selection lazy by converting the distribution factory to async and dynamically importing only the selected installer.
• Start dependency cache restoration earlier (only when cache is configured) and await it before exit while keeping Java/setup errors deterministic.
• Add/update unit tests for async distribution resolution, conditional module loading, and concurrent orchestration; regenerate dist/ and update the release staging script.

Show a summary per file

File	Description
src/util.ts	Removes cache feature detection from the shared util module to avoid eager cache dependency loading.
src/setup-java.ts	Orchestrates async distribution resolution and overlaps cache restore with setup; awaits in-flight cache work before exit.
src/distributions/distribution-factory.ts	Converts factory to async with per-distribution dynamic imports (lazy loading).
src/cache-feature.ts	New module encapsulating cache availability checks (lazy-load target).
package.json	Updates release script to stage chunked dist/setup/*.js artifacts.
dist/setup/index.js	Rebuilt setup entry bundle to support dynamic imports/code splitting.
dist/setup/978.index.js	Generated setup bundle chunk (Zulu installer).
dist/setup/968.index.js	Generated setup bundle chunk (GraalVM installers).
dist/setup/939.index.js	Generated setup bundle chunk (Semeru installer).
dist/setup/874.index.js	Generated setup bundle chunk (Adopt + Temurin installers).
dist/setup/735.index.js	Generated setup bundle chunk (OpenJDK installer).
dist/setup/675.index.js	Generated setup bundle chunk (Dragonwell installer).
dist/setup/63.index.js	Generated setup bundle chunk (Liberica installer).
dist/setup/557.index.js	Generated setup bundle chunk (SapMachine installer).
dist/setup/524.index.js	Generated setup bundle chunk (Liberica NIK installer).
dist/setup/463.index.js	Generated setup bundle chunk (Temurin installer).
dist/setup/394.index.js	Generated setup bundle chunk (cache feature detection).
dist/setup/377.index.js	Generated setup bundle chunk (cache restore/save implementation).
dist/setup/282.index.js	Generated setup bundle chunk (JetBrains installer).
dist/setup/220.index.js	Generated setup bundle chunk (Microsoft installer).
dist/setup/182.index.js	Generated setup bundle chunk (Oracle installer).
dist/setup/151.index.js	Generated setup bundle chunk (Kona installer).
dist/setup/126.index.js	Generated setup bundle chunk (Corretto installer).
dist/setup/19.index.js	Generated setup bundle chunk (Local/jdkfile installer).
dist/cleanup/index.js	Rebuilt cleanup bundle to match new build output.
tests/util.test.ts	Removes cache feature tests/mocks from util tests (logic moved).
tests/setup-java.test.ts	Updates orchestration tests for async factory + concurrent cache restore and deterministic failure handling.
tests/setup-java.module-loading.test.ts	New test ensuring cache modules are not imported when cache input is absent.
tests/distributors/openjdk-installer.test.ts	Updates factory registration test to await async factory.
tests/distributors/graalvm-installer.test.ts	Updates factory mapping test(s) to await async factory.
tests/distributors/distribution-factory.test.ts	Updates all factory tests to async/await and rejects assertions.
tests/distributors/distribution-factory.lazy-loading.test.ts	New test to ensure non-selected installers aren’t imported on Temurin path.
tests/cache-feature.test.ts	New dedicated tests for cache feature detection behavior.

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• Files reviewed: 13/35 changed files
• Comments generated: 2
• Review effort level: Low