Introduce `reason` field in `ReflectiveFieldBuildItem` #709

Job	Run time
CI Sanity Check	1s
Attach pull request number	0s
Initial JDK 17 Build	1s
Calculate Test Jobs	1s
Maven Tests - JDK ${{ matrix.java.name }}	1s
JVM Tests - JDK ${{ matrix.java.name }}	1s
Devtools Tests - JDK ${{ matrix.java.name }}	1s
Gradle Tests - JDK ${{ matrix.java.name }}	1s
Kubernetes Tests - JDK ${{ matrix.java.name }}	1s
Native Tests - ${{ matrix.category }}	1s
Quickstarts Compilation - JDK ${{ matrix.java.name }}	1s
MicroProfile TCKs Tests	1s
Native Tests - Virtual Thread - ${{ matrix.category }}	1s
Upload build stats to collector	1s
Build report	31s
	44s

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