SNOW-3211195 Implement bridge from shaded slf4j to SFLogger

[sfc-gh-pfus]

This PR implements the bridge from shaded slf4j (used by AWS, GCP, Azure and other libraries) to our own SFLogger.

1. slf4j-api is now a compile scope dependency. In the thin jar ,it just forces SLF4J to be present in the final classpath. In the fat jar, it is shaded. Mentioned, shaded dependencies use this shaded SLF4J regardless of JUL or SLF4J used by the target client.
2. Additional classes are added for fat-jar only - they are bridging SLF4J used by internal, shaded dependencies to SFLogger
3. After shading slf4j, we have to "recopy" original SLF4JLogger to fat, because we want it to use the original, client slf4j, and not our shaded version.

[Copilot]

Pull request overview

This PR implements a bridge from shaded SLF4J (used internally by AWS SDK v2, Azure SDK, and Google Cloud SDK) to the Snowflake JDBC driver's own SFLogger abstraction. This ensures that logging from third-party dependencies embedded in the fat jar flows through the driver's logging framework (either JUL by default or the user's SLF4J binding when opted in), rather than being silently discarded or conflicting with the user's SLF4J setup.

Changes:

• Added new fat-jar-only classes (SFBridgeServiceProvider, SFBridgeLoggerFactory, SFBridgeLogger) that implement the SLF4J SPI to bridge shaded SLF4J calls to SFLoggerFactory, plus the corresponding SPI service file.
• Updated Maven build configuration (both pom.xml and FIPS/pom.xml) to shade org.slf4j, include the fat-jar-specific sources/resources, and copy back the unshaded SLF4JLogger.class post-shading so it references the user's real SLF4J.
• Enhanced the fat-jar test app and CI workflow to verify logging works correctly in both JUL and SLF4J modes, including log output verification for cloud SDK logger names.

Reviewed changes

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Show a summary per file

File	Description
src/main/java-fat-jar/.../SFBridgeServiceProvider.java	New SLF4J SPI provider that bootstraps the bridge logger factory for shaded SLF4J
src/main/java-fat-jar/.../SFBridgeLoggerFactory.java	New ILoggerFactory that creates cached SFBridgeLogger instances
src/main/java-fat-jar/.../SFBridgeLogger.java	New SLF4J Logger that delegates all logging calls to SFLogger via SFLoggerFactory
src/main/resources-fat-jar/.../org.slf4j.spi.SLF4JServiceProvider	SPI service file registering the bridge provider for the shaded SLF4J
pom.xml	Adds SLF4J shading relocation, fat-jar source/resource directories, and post-shade class copy
FIPS/pom.xml	Mirrors the same shading and build changes for the FIPS fat jar variant
parent-pom.xml	Changes slf4j-api scope from provided to compile
fat-jar-test-app/src/main/java/.../FatJarTestApp.java	Adds logging setup and verification logic for both JUL and SLF4J modes
fat-jar-test-app/pom.xml	Adds SLF4J profile with logback dependencies, simplifies classpath management
fat-jar-test-app/run.sh	Adds logging mode parameter support (slf4j/jul)
fat-jar-test-app/src/main/resources/logging.properties	JUL configuration for the test app
fat-jar-test-app/src/main/resources/logback.xml	Logback configuration for the SLF4J test mode
.github/workflows/build-test.yml	Splits fat jar CI into separate SLF4J (all clouds) and JUL (AWS only) test jobs
CHANGELOG.md	Documents the new SLF4J bridge feature

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