Support setting request preconditions

[tolzhabayev]

TL;DR

Why?

Add support for passing request precondition arguments to storage client in order to be able to perform safe read-modify-write updates and conditional operations.

How

The storage already supports precondition options, example:
https://github.com/googleapis/nodejs-storage/blob/77070b565bf3a347902d38ed46206b86fbf4ffe8/samples/copyFile.js#L62-L66

It could be a new inputs of type number called:

• preconditionOptionsIfGenerationMatch
• preconditionOptionsIfGenerationNotMatch
• preconditionOptionsIfMetagenerationMatch
• preconditionOptionsIfMetagenerationNotMatch

Detailed design

No response

Additional information

No response

[sethvargo]

Hi @tolzhabayev - thank you for opening an issue. Can you provide an example for what this would look like inside the GitHub Action?