Upgrade to Kotlin 2.2.0

[sdeleuze]

With that upgrade, Kotlin 2.2 is the new baseline for Spring Framework 7.0.

With the upgrade, we should be able to leverage https://youtrack.jetbrains.com/issue/KT-75169 to remove @Suppress("EXTENSION_SHADOWED_BY_MEMBER") annotations.

[sdeleuze]

I still see warnings in IntelliJ IDEA about @Suppress("EXTENSION_SHADOWED_BY_MEMBER") so I will update that later after JetBrains feedback.

[sdeleuze]

No warnings in both Kotlin 2.2.0 compiler and IDEA 2024.2 EAP when removing @Suppress("EXTENSION_SHADOWED_BY_MEMBER") so I removed them.