Improve performance of conditional expressions

### What is the problem the feature request solves?

Conditional expressions are slower when Comet is enabled. This will impact TPC-H and TPC-DS performance.

```
OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
Case When Literal (3 branches): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 48 52 2 21.9 45.7 1.0X
Comet (Scan) 46 51 3 22.7 44.1 1.0X
Comet (Scan + Exec) 57 60 2 18.4 54.3 0.8X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
Case When Literal (10 branches): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 48 51 1 21.6 46.2 1.0X
Comet (Scan) 48 49 1 21.8 45.8 1.0X
Comet (Scan + Exec) 67 69 1 15.8 63.4 0.7X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
Case When Column Result (3 branches): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 37 40 1 28.0 35.7 1.0X
Comet (Scan) 39 42 4 26.9 37.1 1.0X
Comet (Scan + Exec) 45 47 3 23.6 42.4 0.8X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
Case When Column Result (10 branches): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 55 56 1 19.2 52.0 1.0X
Comet (Scan) 47 50 2 22.3 44.8 1.2X
Comet (Scan + Exec) 73 76 1 14.3 69.9 0.7X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
If Literal: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 40 43 4 25.9 38.6 1.0X
Comet (Scan) 40 42 2 26.1 38.2 1.0X
Comet (Scan + Exec) 45 46 1 23.3 42.9 0.9X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
If Column Result: Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 33 35 1 31.8 31.4 1.0X
Comet (Scan) 33 35 1 31.7 31.5 1.0X
Comet (Scan + Exec) 39 41 2 26.8 37.3 0.8X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
Nested If Literal (4 outcomes): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 40 43 2 26.0 38.5 1.0X
Comet (Scan) 41 42 1 25.8 38.8 1.0X
Comet (Scan + Exec) 52 55 1 20.0 49.9 0.8X

OpenJDK 64-Bit Server VM 17.0.17+10-Ubuntu-122.04 on Linux 6.8.0-90-generic
AMD Ryzen 9 7950X3D 16-Core Processor
Nested If Column Result (4 outcomes): Best Time(ms) Avg Time(ms) Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
Spark 42 45 2 24.9 40.2 1.0X
Comet (Scan) 42 44 2 24.8 40.4 1.0X
Comet (Scan + Exec) 50 52 2 21.1 47.5 0.8X
```

### Describe the potential solution

_No response_

### Additional context

_No response_