fix: resolve executable against PATH instead of cwd on Windows

### Describe the bug

On Windows, programs will prefer executables in the current working directory over those in path e.g. a node.exe file in the working directory. This is not the intended behavior, and can cause problems when the developer expects to use executables in their PATH.

### Regression Issue

- [ ] Select this option if this issue appears to be a regression.

### Last Known Working CDK Version

_No response_

### Expected Behavior

Prefer executables on PATH over cwd.

### Current Behavior

Searches for executables in cwd before consulting PATH.

### Reproduction Steps

N/A.

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CDK CLI Version

N/A

### Framework Version

_No response_

### Node.js Version

All

### OS

Windows

### Language

TypeScript

### Language Version

_No response_

### Other information

_No response_