Enable Gradle configuration cache

[trivikr]

Issue #, if available:

• Doc https://docs.gradle.org/current/userguide/configuration_cache.html
• User Guide https://docs.gradle.org/9.0.0/userguide/configuration_cache_enabling.html

Description of changes:

Enables Gradle configuration cache for improved build performance

$ smithy-typescript> ./gradlew clean build -Plog-tests
Reusing configuration cache.
...
BUILD SUCCESSFUL in 14s
33 actionable tasks: 31 executed, 2 up-to-date
Configuration cache entry reused

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