and instead directly access the array stored in OSLogArguments.
This will make constant folding of the array possible when its
contents are inferred at compile time by the OSLogOptimization pass.
library so that the type: OSLogByteBufferBuilder is no longer needed.
This would make backward deployment of code using the new log APIs
easier, besides other minor benefits.
the builtin.globalStringTablePointer to the new OSLog overlay.
Modify the new OSLog implementation to use this SPI instead of
`withCString` to pass the (compiler-generated) format string to
the C os_log_impl ABI.
Move the OSLogOptimization pass before constant propagation in
the pass pipeline so that the SPI and the builtin it uses can be
folded to a string_literal instruction.
Update OSLogTests to work with the changes in the implementation.
