[clang][bytecode] Handle DiscardResult for fixed-point literals (#110475)

[clang][bytecode] Implement more binary operators for fixed point types (#110423)

[clang][bytecode] Implement fixed-point-to-int casts (#110417)

And some cleanups around overflow handling.

[clang][bytcode] Convert Fixed Point values to target semantics... (#110411)

... after a binary operation. The Result of the operation is in the
common semantics of RHS and LHS, so we need to conve

[clang][bytcode] Convert Fixed Point values to target semantics... (#110411)

... after a binary operation. The Result of the operation is in the
common semantics of RHS and LHS, so we need to convert that to the
semantics of the BinaryOperator expression.

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[clang][bytecode] Implement fixed point casts (#110409)

[clang][bytecode] Implement fixed-point add (#110405)

[clang][bytecode] Implement fixed-point-to-float casts (#110369)

[clang][bytecode] Implement floating-to-fixed-point casts (#110361)

[clang][bytecode] Implement (N)EQ between fixed point and integral (#110358)

Convert the non-fixed-point side to a fixed-point type before doing the
comparison.

[clang][bytecode] Implement integral-to-fixed-point casts (#110350)

[clang][bytecode] Implement zero-init for fixed point types (#110257)

[clang][bytecode] Implement fixed point negation (#110237)

[clang][bytecode] Start implementing fixed point types (#110216)

Add the primitive type and implement to-bool casts.