Allow env values in `setLocation` and `travel` commands

[prasanta-biswas]

Proposed Changes

Fixes an issue where setLocation command fails if latitude and longitude values are passed from environment variables.

Testing

• Ran integration tests using ./gradlew :maestro-test:test, all tests passed.
• Manually tested setLocation command by passing latitude and longitude as env parameters from the command line and within the flow file using the env keyword. It worked for both inline-defined latitude and longitude and passed from env.

Issues Fixed

fixes #1765