Bump org.jetbrains.kotlin:kotlin-gradle-plugin-api from 2.0.21 to 2.1.0 in /devtools/gradle #1393

Job	Run time
Attach pull request number	2s
CI Sanity Check	31s
Initial JDK 17 Build	11m 7s
Calculate Test Jobs	12s
Gradle Tests - JDK 17	33m 52s
JVM Tests - JDK 17	8m 40s
Gradle Tests - JDK 17 Windows	55m 37s
JVM Tests - JDK 21	10m 11s
Maven Tests - JDK ${{ matrix.java.name }}	0s
JVM Tests - JDK 17 Windows	13m 26s
Devtools Tests - JDK ${{ matrix.java.name }}	0s
Quickstarts Compilation - JDK 17	7m 19s
Native Tests - Misc4	20m 42s
MicroProfile TCKs Tests	0s
Native Tests - Virtual Thread - ${{ matrix.category }}	0s
Kubernetes Tests - JDK ${{ matrix.java.name }}	0s
Upload build stats to collector	0s
Build report	36s
	2h 42m 15s

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