Only update ~/.docker/config.json if it exists #36170

Job	Run time
CI Sanity Check	31s
Initial JDK 17 Build	12m 41s
Attach pull request number	2s
Calculate Test Jobs	9s
JVM Tests - JDK 17	52m 3s
JVM Tests - JDK 21	48m 17s
Gradle Tests - JDK 17	1m 40s
Devtools Tests - JDK 7	50s
JVM Tests - JDK 17 Windows	45m 19s
Kubernetes Tests - JDK 17	3m 12s
Gradle Tests - JDK 17 Windows	3m 23s
Kubernetes Tests - JDK 21	3m 9s
Devtools Tests - JDK 21	51s
Kubernetes Tests - JDK 17 Windows	2m 49s
Devtools Tests - JDK 17 Windows	2m 17s
Maven Tests - JDK 17	48m 3s
Quickstarts Compilation - JDK 17	5m 29s
Maven Tests - JDK 17 Windows	1h 0m 6s
MicroProfile TCKs Tests	7m 11s
Native Tests - Virtual Thread - Main	22m 50s
Native Tests - Virtual Thread - Messaging	10m 0s
Native Tests - Main	7m 9s
Native Tests - Data1	29m 37s
Native Tests - Data2	27m 26s
Native Tests - Data3	22m 12s
Native Tests - Data4	17m 45s
Native Tests - Data5	22m 20s
Native Tests - Data6	23m 48s
Native Tests - Data7	33m 45s
Native Tests - Amazon	7m 38s
Native Tests - Messaging1	25m 4s
Native Tests - Messaging2	14m 35s
Native Tests - Security1	21m 36s
Native Tests - Security2	27m 2s
Native Tests - Security3	13m 44s
Native Tests - Cache	13m 51s
Native Tests - HTTP	41m 9s
Native Tests - Misc1	23m 33s
Native Tests - Misc2	18m 54s
Native Tests - Misc3	32m 59s
Native Tests - Misc4	28m 54s
Native Tests - Spring	18m 28s
Native Tests - gRPC	16m 22s
Native Tests - Windows - RESTEasy Jackson	5m 39s
Native Tests - DevTools Integration Tests	3m 31s
Native Tests - AWT, ImageIO and Java2D	6m 8s
Build report	46s
	13h 54m 47s

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