Add toolchain java path to environment variables in ExecMojo #815

Job	Run time
Verify / ubuntu-latest jdk-17-zulu 3.9.9	2m 32s
Verify / setup-matrix	1s
Verify / ubuntu-latest jdk-17-zulu 3.6.3	1m 40s
Verify / ubuntu-latest jdk-17-zulu 3.9.9	2s
Verify / ubuntu-latest jdk-17-zulu 4.0.0-beta-4	1m 39s
Verify / ubuntu-latest jdk-21-zulu 3.6.3	1m 41s
Verify / ubuntu-latest jdk-21-zulu 3.9.9	1m 37s
Verify / ubuntu-latest jdk-21-zulu 4.0.0-beta-4	1m 39s
Verify / ubuntu-latest jdk-8-zulu 3.6.3	1m 39s
Verify / ubuntu-latest jdk-8-zulu 3.9.9	1m 39s
Verify / windows-latest jdk-17-zulu 3.6.3	1m 23s
Verify / windows-latest jdk-17-zulu 3.9.9	1m 26s
Verify / windows-latest jdk-17-zulu 4.0.0-beta-4	1m 27s
Verify / windows-latest jdk-21-zulu 3.6.3	1m 25s
Verify / windows-latest jdk-21-zulu 3.9.9	1m 23s
Verify / windows-latest jdk-21-zulu 4.0.0-beta-4	1m 27s
Verify / windows-latest jdk-8-zulu 3.6.3	1m 18s
Verify / windows-latest jdk-8-zulu 3.9.9	1m 23s
Verify / macos-latest jdk-17-zulu 3.6.3	1m 42s
Verify / macos-latest jdk-17-zulu 3.9.9	1m 39s
Verify / macos-latest jdk-17-zulu 4.0.0-beta-4	1m 44s
Verify / macos-latest jdk-21-zulu 3.6.3	1m 41s
Verify / macos-latest jdk-21-zulu 3.9.9	1m 33s
Verify / macos-latest jdk-21-zulu 4.0.0-beta-4	1s
Verify / macos-latest jdk-8-zulu 3.6.3	1s
Verify / macos-latest jdk-8-zulu 3.9.9	1s
	33m 43s

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