Emit remaining int operations

[hugrbot]

Originally raised by @croyzor:

Having done some int ops We're still missing emission for some int ops from the arithmetic extension:

Done in #1835

• ine,
• imax_u,
• imax_s,
• imin_u,
• imin_s,
• iabs,
• iand,
• ior,
• ixor,
• inot,
• ishl,
• ishr,

In progress (#1839)

• ipow

These should be easy (supported in LLVM)

• iwiden_u,
• iwiden_s,
• inarrow_u,
• inarrow_s,
• itobool,
• ifrombool,
• idivmod_u,
• idivmod_s,
• imod_u,

These i'm not so sure about

• imod_checked_u,
• imod_checked_s,
• idiv_checked_u,
• idiv_checked_s,
• idivmod_checked_u,
• idivmod_checked_s,
• irotl,
• irotr,

These seem very hard

• itostring_u,
• itostring_s,

[ss2165]

priorities:
ine, ixor, ipow