Align to Native Build Tools metadata repository default

[mhalbritter]

The native build tools plugin will change their metadata repository default from false to true in the future. When they did that, we can remove the code in the Boot plugins which sets this to true.

graalvm/native-build-tools#553

[mhalbritter]

The PR to change the default has been merged: graalvm/native-build-tools#557

[mhalbritter]

NBT 0.10.0 has been released, which contains this change.

[mhalbritter]

Upgrade to NBT 0.10.0 done in #39398.

[wilkinsona]

We should update start.spring.io as well so that it uses 0.10.0 with Boot 3.3 apps.