add automatic api validation support

[pbalcer]

Implement an optional validation API layer that verifies the correctness of UR calls at runtime. In addition to performing basic sanity checks (e.g., checking if provided handles are valid), it should eventually be extended to perform more complex semantic checks, like checking for missing arguments in kernels or tracking object ownership.
This implementation can be modeled after a similar functionality in level-zero.

Overall, we need to:

1. Implement validation layer infrastructure (controlled with an env variable, UR_VALIDATION=none/basic/complex?)
2. Analyze the UR API and create a documentation of useful checks that the validation layer could perform.
3. Implement those checks, starting from high-impact ones.

[pbalcer]

Done with #318 #221