`build!` without forming computing the `Vector` when `simulate_vector==true`

[codecov[bot]]

Codecov Report

Patch coverage: 85.48% and project coverage change: -4.93 :warning:

Comparison is base (2879888) 99.13% compared to head (22beb03) 94.20%.

:exclamation: Current head 22beb03 differs from pull request most recent head 6e6acef. Consider uploading reports for the commit 6e6acef to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #41 +/- ## ========================================== - Coverage 99.13% 94.20% -4.93% ========================================== Files 7 7 Lines 232 259 +27 ========================================== + Hits 230 244 +14 - Misses 2 15 +13 ``` | [Impacted Files](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers) | Coverage Δ | | |---|---|---| | [src/linearoperator.jl](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL2xpbmVhcm9wZXJhdG9yLmps) | `100.00% <ø> (ø)` | | | [src/struct.jl](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL3N0cnVjdC5qbA==) | `64.28% <30.76%> (-35.72%)` | :arrow_down: | | [src/base.jl](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL2Jhc2Uuamw=) | `98.36% <100.00%> (+0.24%)` | :arrow_up: | | [src/broadcast.jl](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL2Jyb2FkY2FzdC5qbA==) | `100.00% <100.00%> (ø)` | | | [src/krylov.jl](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL2tyeWxvdi5qbA==) | `93.93% <100.00%> (-4.70%)` | :arrow_down: | | [src/linearAlgebra.jl](https://codecov.io/gh/JuliaSmoothOptimizers/PartitionedVectors.jl/pull/41?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers#diff-c3JjL2xpbmVhckFsZ2VicmEuamw=) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaSmoothOptimizers)

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