[feat]tools-v2: add snapshot utils

[baytan0720]

What problem does this PR solve?

too much snapshot const and functions are private

Issue Number: #xxx

Problem Summary:

public snapshot const and functions in internal/utils/snapshot.go

What is changed and how it works?

What's Changed:

create tools-v2/internal/utils/snapshot.go
move and modify tools-v2/pkg/cli/command/curvebs/delete/volume/clone.go to tools-v2/pkg/cli/command/curvebs/delete/volume/clone/clone.go
move and modify tools-v2/pkg/cli/command/curvebs/delete/volume/recover.go to tools-v2/pkg/cli/command/curvebs/delete/volume/recover/recover.go
delete tools-v2/pkg/cli/command/curvebs/delete/volume/clone_or_recover.go

How it Works:

Side effects(Breaking backward compatibility? Performance regression?):

Check List

• Relevant documentation/comments is changed or added
• I acknowledge that all my contributions will be made under the project's license

[baytan0720]

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[Cyber-SiKu]

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