Specialize gates on signature

[jlapeyre]

There is only one structure in the ASG for defining gates

openqasm3_parser/crates/oq3_semantics/src/asg.rs

Lines 514 to 519 in 88211a6

	pub struct GateDeclaration {
	name: SymbolIdResult,
	params: Option<Vec<SymbolIdResult>>,
	qubits: Vec<SymbolIdResult>,
	block: Block,
	}

and one for calling gates

openqasm3_parser/crates/oq3_semantics/src/asg.rs

Lines 566 to 571 in 88211a6

	pub struct GateCall {
	name: SymbolIdResult,
	params: Option<Vec<TExpr>>,
	qubits: Vec<TExpr>,
	modifier: Option<GateModifier>,
	}

Especially for the latter, specializing to the number of qubits and parameters is likely to improve performance and memory efficiency.