Provide bottle(s) with rnp brew formulae

[maxirmx]

          > @maxirmx can't we specify a bottle dependency on the particular botan version? The benefit of the bottle is to allow people not to go through compilation, and it is an important benefit.

My understanding is that botan provides a formula to install only the latest version. Thus, even if we specify a dependency on some other version of botan, it will not be installed.

I believe we can

• make a formula that uses bottle if botan version matches and builds from source if botan version does not match
• link botan as static library in homebrew formula. It will eliminate run-time dependency
• link rnp agains more generic reference (botan-2.dylib instead of botan-2.19.dylib). This will probably work but it is something to be done in core rnp build scripts

Also I guess we will need several bottles to make it effective. Botan provides seven:

• arm64_ventura
• arm64_monterey
• arm64_big_sur
• ventura
• monterey
• big_sur
• catalina

This may require cross-compile options that will also go to core rnp build scripts

I suggest we release a simple fix first since keeping the bottle does not look like a one-liner fix

Originally posted by @maxirmx in https://github.com/rnpgp/homebrew-rnp/issues/32#issuecomment-1508197313

[ni4]

As far as I remember, we needed specific Botan's version at the start since actual ones did not have required functionality. Right now we just may use the latest 2.x. Probably 3.x should also work but I didn't try it yet.