feat: Add https tar.gz remote source for context

[jfrabaute]

Description

Add remote https tar.gz source for the context.
The context could be on a remote tar.gz file accessible through an https server.
This is the case for example when having the source code in gerrit and using gitiles as a gerrit plugin so it's possible to get the code for an exact commit in tar.gz format.

Submitter Checklist

These are the criteria that every PR should meet, please check them off as you
review them:

• [X ] Includes unit tests

Reviewer Notes

• The code flow looks good.
• Unit tests and or integration tests added.

Release Notes

Describe any changes here so maintainer can include it in the release notes, or delete this block.

Examples of user facing changes:
- kaniko adds a new flag `--registry-repo` to override registry

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[jfrabaute]

@googlebot I signed it!

[jfrabaute]

Hi,

I didn't see there is an issue opened for this as well: #1464

Thanks.

[tejal29]

@jfrabaute Can you please add the missing license header?

[jfrabaute]

@jfrabaute Can you please add the missing license header?

Looks like you sent a fix with the license header. Sorry about that.

Thanks!

[tejal29]

no worries. Sorry, i should i have waited.