Remove implicit modifier handling during OpenQASM lowering

[idavis]

In the original implementation of the OpenQASM compiler, gates with implicit modifiers needed to be specially handled by redefining them as their unmodiefied variants and collecting the modifier. For example, ch would be converted to h with a ctrl(1) modifier and would be used to build up the gate call with the additional explicit modifiers.

With the introduction of the Std.OpenQASM library, we can now call those gates directly without needing to decompose them. This also cleans up error messages as any errors would have been associated with the unmodified gate name prior.

[github-actions]

Change in memory usage detected by benchmark.

Memory Report for 1d271ac

Test	This Branch	On Main	Difference
compile core + standard lib	25683854 bytes	25440502 bytes	243352 bytes

[github-actions]

Change in memory usage detected by benchmark.

Memory Report for 00d508e

Test	This Branch	On Main	Difference
compile core + standard lib	25683854 bytes	25440502 bytes	243352 bytes

[github-actions]

Change in memory usage detected by benchmark.

Memory Report for 41c9c27

Test	This Branch	On Main	Difference
compile core + standard lib	25683854 bytes	25440502 bytes	243352 bytes

[DmitryVasilevsky]

Library changes look good. Approving library part.

[github-actions]

Change in memory usage detected by benchmark.

Memory Report for c93cd74

Test	This Branch	On Main	Difference
compile core + standard lib	25677846 bytes	25440502 bytes	237344 bytes