This allows removing dependencies that are not explicitly unused by the
gdextension being built and is implemented using an intermediate json
API file with the methods and classes stripped (i.e. without touching
the file generators).
(cherry picked from commit c4f1abe3f9)
Split `targets` tool logic, moving all the compiler-specific flags to a
new `common_compiler_flags.py` file, and everything else (CPPDEFINES,
optimize option logic, dev build logic, etc) to the `godotcpp` tool.
The default tools now apply the common compiler flags by importing the
file and explicitly calling `configure`.
This comment enables the possibility to build the "compile_commands.json"
file by only using `scons -Q compiledb`. No need to use the argument
`compiledb=yes`.
And when using the `compiledb=yes`, it will create a
"compiled_commands.json" automatically.
