Move the If nightly==1 check out of command.

[QiliangCui]

Description

Move the "if" logic out of command to make the test status cleaner in buildkite.
(redo #1005 by fixing "check_result.sh")

1. Move "nightly==1" logic to "if" to avoid skipped tests being displayed on UI.
2. Mark "skipped" for kernel related tests. There is no way to say "if nightly or file changed run tests".

Test

Test skipped

Touch kernel file

Torch kernel collective file

[github-actions]

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