deps: update kotlin monorepo to v2.4.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.jetbrains.kotlin.jvm (source)	2.3.21 → 2.4.0
org.jetbrains.kotlin.plugin.serialization (source)	2.3.21 → 2.4.0
org.jetbrains.kotlin:kotlin-bom (source)	2.3.21 → 2.4.0
org.jetbrains.kotlin:kotlin-gradle-plugin (source)	2.3.21 → 2.4.0

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.43%. Comparing base (2adf5e4) to head (c794f91).

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #11934   +/-   ##
=========================================
  Coverage     58.43%   58.43%           
  Complexity     1807     1807           
=========================================
  Files           361      361           
  Lines         13499    13499           
  Branches       1383     1383           
=========================================
  Hits           7888     7888           
  Misses         5115     5115           
  Partials        496      496           

Flag	Coverage Δ
funTest-external-tools	14.64% <ø> (ø)
funTest-no-external-tools	30.29% <ø> (ø)
test-ubuntu-24.04	41.78% <ø> (ø)
test-windows-2025	41.76% <ø> (ø)

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[renovate]

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[sschuberth]

Blocked by build-health not supporting Kotlin 2.4 yet.