Fix ternary value copying

[marcauberer]

• Fix ternary value copying
• Add more lifetime object tests

We have four different possibilities of operand combinations (temporary/non-temporary):

true is tmp, false is tmp:

    true_block:
        trueVal = getValue(trueExpr)
        jmp end_block
    false_block:
        falseVal = getValue(falseExpr)
        jmp end_block:
    end_block:
        resultVal = phi [true_block trueVal, false_block falseVal]

true is tmp, false is not:

        falsePtr = alloca
    true_block:
        truePtr = getAddress(trueExpr)
        jmp end_block
    false_block:
        originalPtr = getAddress(falseExpr)
        callCopyCtor(falsePtr, originalPtr)
        jmp end_block
    end_block:
        resultPtr = phi [true_block truePtr, false_block falsePtr]

true is not, false is tmp:
    
        truePtr = alloca
    true_block:
        originalPtr = getAddress(trueExpr)
        callCopyCtor(truePtr, originalPtr)
        jmp end_block
    false_block:
        falsePtr = getAddress(falseExpr)
        jmp end_block
    end_block:
        resultPtr = phi [true_block truePtr, false_block falsePtr]

true is not, false is not:

        resultPtr = alloca
    true_block:
        truePtr = getAddress(trueExpr)
        jmp end_block
    false_block:
        falsePtr = getAddress(falseExpr)
        jmp end_block
    end_block:
        originalPtr = phi [true_block truePtr, false_block falsePtr]
        callCopyCtor(originalPtr, resultPtr)