Add SameSite None to fix embedded version

[GSokol]

The embedded version fof the site failed to use cookies, so it generates
new anonymous id. Fixing it.

Description of the change

Description here

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Related issues

Fix #1

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests
• All tests related to the changed code pass in development

Code review

• This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• "Ready for review" label attached to the PR and reviewers mentioned in a comment
• Changes have been reviewed by at least one other engineer
• Issue from task tracker has a link to this pull request

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This change is 

[saikumarrs]

@GSokol Thanks for raising the PR. However, the changes could inadvertently turn out to be a breaking change for some SDK users.

Instead, you can add support for SameSite storage option here. We already support an option for the Secure header.

[GSokol]

@saikumarrs, yes, great advice! Thank you, I will do so!

[saikumarrs]

@saikumarrs, yes, great advice! Thank you, I will do so!

Thanks. The changes look good to me. I left a comment to address a minor issue.

As a next step, please sign the CLA using this form.

[GSokol]

@saikumarrs done

[saikumarrs]

@saikumarrs done

@GSokol Thanks. We'll absorb this PR and release a new SDK version next week.
Thanks for understanding.

[saikumarrs]

@GSokol Thanks for your patience. We are currently swamped and won't be able to release a new version of the SDK this week. However, we've added this to our immediate sprint roadmap and will include it in the next week's release.
CC @MoumitaM @pallabmaiti