move Floor, Gcd, Lcm, Pi to datafusion-functions

[Omega359]

Is your feature request related to a problem or challenge?

As part of #9285 move the Floor, Gcd, Lcm, Pi functions to the new datafusion-functions crate in the new structure.

Describe the solution you'd like

Functions are migrated to the new crate and use the new patterns as described in #9286 & #9216

Describe alternatives you've considered

No response

Additional context

No response

[tinfoil-knight]

@Omega359 I realised while working on #9868 that some parts (eg: simplifying expressions: search simpl_log, simpl_power) of log & power functions are dependent on each other.

I think that these functions should be migrated together. Since you're already migrating the power function, do you want to also pick up the log function in the same PR?

[Omega359]

Oh, I just created the tickets .. I wasn't attempting to do all of them @tinfoil-knight :) If you are working on something related feel free to take this ticket too

[tinfoil-knight]

@Omega359 Thank you! I just need the Power function since it's dependent on Log.

I've opened a new issue: #9875 for it. Please update this issue to not include the Power function.

[Omega359]

take

[alamb]

❤️ -- thank you @Omega359