Fix solution type from BVPM2 and BVPSOL

[ErikQQY]

Now the solution type from ODEInterface.jl is compatible with the others

[github-actions]

Benchmark Results

	master	4703860...	t[master]/t[4703860...]
Simple Pendulum/IIP/MultipleShooting(10, Tsit5; grid_coarsening = false)	3.08 ± 0.14 ms	3.1 ± 0.14 ms	0.996
Simple Pendulum/IIP/MultipleShooting(10, Tsit5; grid_coarsening = true)	5.64 ± 0.23 ms	5.71 ± 0.25 ms	0.988
Simple Pendulum/IIP/MultipleShooting(100, Tsit5; grid_coarsening = false)	0.0765 ± 0.0041 s	0.0792 ± 0.0055 s	0.967
Simple Pendulum/IIP/MultipleShooting(100, Tsit5; grid_coarsening = true)	0.273 ± 0.0039 s	0.278 ± 0.0058 s	0.984
Simple Pendulum/IIP/Shooting(Tsit5())	0.281 ± 0.023 ms	0.282 ± 0.025 ms	0.994
Simple Pendulum/OOP/MultipleShooting(10, Tsit5; grid_coarsening = false)	7.05 ± 0.38 ms	7.16 ± 0.24 ms	0.984
Simple Pendulum/OOP/MultipleShooting(10, Tsit5; grid_coarsening = true)	12.6 ± 5.9 ms	12.6 ± 6 ms	0.993
Simple Pendulum/OOP/MultipleShooting(100, Tsit5; grid_coarsening = false)	0.191 ± 0.0048 s	0.192 ± 0.0067 s	0.994
Simple Pendulum/OOP/MultipleShooting(100, Tsit5; grid_coarsening = true)	1.08 ± 0.016 s	1.08 ± 0.025 s	0.996
Simple Pendulum/OOP/Shooting(Tsit5())	1.1 ± 0.066 ms	1.1 ± 0.082 ms	1.01
time_to_load	9.79 ± 0.08 s	9.8 ± 0.07 s	0.999

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).