zend_enum: Rename try parameter to avoid conflict with C++ reserved word

[oplanre]

Importing zend_enum.h breaks C++ files and needs to be bypassed with something like:

#define try try_
#include <zend_enum.h>
#undef try

This simple change fixes that.

[iluuu1994]

This is named after BackedEnum::tryFrom(), so there's some value in keeping the terminology consistent. I'd prefer to just add a _ suffix in the header file, but I'll go with the majority.

[cmb69]

Unless changing a parameter name is considered to constitute an API break, I suggest to apply to PHP-8.2.

I don't mind the name, but somewhat dislike trailing underscores.

[iluuu1994]

Unless changing a parameter name is considered to constitute an API break, I suggest to apply to PHP-8.2.

Should be fine to apply to 8.2.

[cmb69]

I've restarted the failing Windows CI run, that failed during install of additional components.

[cmb69]

@oplanre, did you close this deliberately? Are you planning to open a new PR instead?