Improve instructions in CONTRIBUTING.md #2587

Job	Run time
Javadoc	3m 16s
Unit test with docker service [JDK8]	14m 8s
Unit test with cloud	4m 48s
Code format	44s
Unit test with in-memory test service [Edge]	12m 23s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, true)	6m 40s
Build native test server / Build native test server (macos-15-intel, macOS, amd64)	6m 24s
Build native test server / Build native test server (ubuntu-24.04-arm, linux, arm64)	5m 54s
Build native test server / Build native test server (ubuntu-latest, linux, amd64, false)	6m 47s
Build native test server / Build native test server (macos-latest, macOS, arm64)	12m 7s
Build native test server / Build native test server (windows-latest, windows, amd64)	6m 46s
	1h 19m 57s

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