Add a new 'all' parameter to _mesa_get_compressed_formats() to indicate whether

Add a new 'all' parameter to _mesa_get_compressed_formats() to indicate whether
all formats or just those without restrictions/limitations should be returned.
We want all when validating the internalFormat parameter to
glCompressedTexImage2D but only want unrestricted formats when handling the
GL_COMPRESSED_TEXTURE_FORMATS query.