[AMORO2795][helm chart] add variables and descriptions into values.yaml

[lianneli]

Why are the changes needed?

Fix #2795

Brief change log

• Add variables existed in templates but not in Values.yaml. Those variables are: nameOverride, commonLabels and commonAnnotations.
• Change Values.yaml: add more descriptions, refs and modify the file with standard format which seems more pretty.

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before making a pull request

test with unittest(#2794)
This change is not dependency by #2794 , Just use it as test.

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? none

[lianneli]

@baiyangtx Another pr, Could you please help to review? Thanks.

[baiyangtx]

LGTM， thanks for your contributions