Update kotlin to v1.9.23-1.0.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.devtools.ksp:symbol-processing-gradle-plugin (source)	1.9.23-1.0.19 -> 1.9.23-1.0.20
com.google.devtools.ksp:symbol-processing-api (source)	1.9.23-1.0.19 -> 1.9.23-1.0.20

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Release Notes

google/ksp (com.google.devtools.ksp:symbol-processing-gradle-plugin)

v1.9.23-1.0.20

Compare Source

KSP1 issues fixed

• performance optimization for certain workload consists of heavy Java files, including
  • Replace IdKey's impl with identityHashCode #​1804
  • Cache enclosed descriptors by name #​1808
• Add excludedSources to the KSP extension object #​1793 thanks to @​bitspittle

KSP2 issues fixed

• NoClassDefFoundError for LZ4Factory when trying KSP2 #​1713
• Calling KSType.replace() with original arguments results in #​1807
• Static fields in base class appear in derived classes #​1744
• fix backing field checking for top level callables
• support sealed inheritors lookup.
• support type alias for getSymbolsWithAnnotation
• support more types for reference elements

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