feat(sqllogictest): Add support for iceberg datafusion sqllogictest integration (apache#1764)

## Which issue does this PR close?

- Relates to apache#1211
- Part of apache#1621 
- Add support for iceberg datafusion integration with sqllogictests

## What changes are included in this PR?
* Add sqllogictests entry point `sqllogictests.rs`
* Update `Schedule` to track `EngineRunner` instead of `Engine`
* Update datafusion engine to run slt file with sqllogictest


## Are these changes tested?
* `cargo test --test sqllogictests`
```
    Finished `test` profile [unoptimized + debuginfo] target(s) in 0.46s
     Running tests/sqllogictests.rs (target/debug/deps/sqllogictests-8ee6c1e0fdedebe4)

running 1 test
test schedule: df_test.toml ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
```

---------

Co-authored-by: Renjie Liu <[email protected]>

Author: lliangyu-lin

.github/workflows/ci.yml

@@ -89,6 +89,18 @@ jobs:
           - macos-latest
           - windows-latest
     steps:
+      - name: Maximize build space (Ubuntu)
+        if: matrix.os == 'ubuntu-latest'
+        uses: easimon/maximize-build-space@master
+        with:
+          remove-dotnet: "true"
+          remove-android: "true"
+          remove-haskell: "true"
+          remove-codeql: "true"
+          remove-docker-images: "true"
+          root-reserve-mb: 10240
+          temp-reserve-mb: 10240
+
       - uses: actions/checkout@v5
 
       - name: Setup Rust toolchain