Update kotlin monorepo to v1.7.21

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.jetbrains.kotlin:kotlin-test-junit5 (source)	1.7.20 -> 1.7.21
org.jetbrains.kotlin:kotlin-test (source)	1.7.20 -> 1.7.21
org.jetbrains.kotlin:kotlin-stdlib (source)	1.7.20 -> 1.7.21
org.jetbrains.kotlin:kotlin-maven-plugin (source)	1.7.20 -> 1.7.21

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Release Notes

JetBrains/kotlin

### [`v1.7.21`](https://togithub.com/JetBrains/kotlin/blob/HEAD/ChangeLog.md#​1721) ##### Compiler - [`KT-54463`](https://youtrack.jetbrains.com/issue/KT-54463) Delegating to a field with a platform type causes java.lang.NoSuchFieldError: value$delegate - [`KT-54509`](https://youtrack.jetbrains.com/issue/KT-54509) Ir Interpreter: unable to evaluate string concatenation with "this" as argument - [`KT-54004`](https://youtrack.jetbrains.com/issue/KT-54004) Builder type inference does not work correctly with variable assignment and breaks run-time - [`KT-54393`](https://youtrack.jetbrains.com/issue/KT-54393) Change in behavior from 1.7.10 to 1.7.20 for java field override. - [`KT-54615`](https://youtrack.jetbrains.com/issue/KT-54615) JVM: Internal error in file lowering: java.lang.AssertionError: Error occurred while optimizing an expression - [`KT-54581`](https://youtrack.jetbrains.com/issue/KT-54581) JVM: "VerifyError: Bad type on operand stack" with generic inline function and `when` inside try-catch block - [`KT-53146`](https://youtrack.jetbrains.com/issue/KT-53146) JVM IR: unnecessary checkcast of null leads to NoClassDefFoundError if the type isn't available at runtime - [`KT-54600`](https://youtrack.jetbrains.com/issue/KT-54600) NPE on passing nullable Kotlin lambda as Java's generic SAM interface with `super` type bound - [`KT-54707`](https://youtrack.jetbrains.com/issue/KT-54707) "VerifyError: Bad type on operand stack" in inline call chain on a nullable array value - [`KT-54650`](https://youtrack.jetbrains.com/issue/KT-54650) Binary incompatible ABI change in Kotlin 1.7.20 - [`KT-54802`](https://youtrack.jetbrains.com/issue/KT-54802) "VerifyError: Bad type on operand stack" for inline functions on arrays ##### Native. Runtime. Memory - [`KT-54498`](https://youtrack.jetbrains.com/issue/KT-54498) Deprecation message of 'FreezingIsDeprecated' is not really helpful ##### Tools. Gradle. Multiplatform - [`KT-54387`](https://youtrack.jetbrains.com/issue/KT-54387) Remove MPP alpha stability warning - [`KT-48436`](https://youtrack.jetbrains.com/issue/KT-48436) False positive "The Kotlin source set androidAndroidTestRelease was configured but not added to any Kotlin compilation" ##### Tools. JPS - [`KT-45474`](https://youtrack.jetbrains.com/issue/KT-45474) False positive NO_ELSE_IN_WHEN on sealed class with incremental compilation

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[yegor256]

@rultor please, try to merge

[rultor]

@rultor please, try to merge

@yegor256 Thanks for your request; @olesiasub please confirm this.