[Ktor] Latest Ktor, serializer, html dsl versions

[inemtsev]

Updated all Ktor tests to use latest versions and JVM 17.

Kotlin 1.6.21 -> 1.9.22 Ktor 2.0.1 -> 2.3.11 Kotlinx Serializer 1.3.2 -> 1.6.3 Kotlinx Html 0.7.3 -> 0.11.0

JVM 11 -> 17

[inemtsev]

Looks much more up-to-date. Ready to merge.

[inemtsev]

Modernized other Ktor-related apps to use the same JVM version and latest dependencies, fixed breaking changes

[inemtsev]

reactivepg-client test is redundant because that library has evolved into pg-client, and there is already a test for that. I removed it, I think worthy cleanup (haven't been touched in 5 years)

[inemtsev]

Should be ready for tests, runs fine on my machine 😛

[inemtsev]

I fixed the config, ready to go

[inemtsev]

My apologies, there was more cleanup required to remove legacy test. Should be good now 👍

[NateBrady23]

No worries!