Secure Boot HLD

[davidpil2002]

This PR contains Secure Boot HLD

PR title	state	context
[sonic-buildimage] Add support for Secure Boot	TBD	TBD
[sonic-mgmt] Add support for Secure Boot	TBD	TBD

[zhangyanzhao]

@madhupalu from Aviz Networks will help to review this.

[liat-grozovik]

@yxieca , @madhupalu as stated in the 202211 release features list you are the reviewers. Could you please help to review? Nvidia will soon have the code PRs avaialble thus need to close the HLD first.

[Yarden-Z]

@madhupalu can you please review the answer to your question and mark whether its acceptable? also @yxieca , can you please review and approve this commit?

[liat-grozovik]

Last call on HLD review. This is a kindly reminder to those who provided feedback to approve or add new comment. @zhangyanzhao if no comments till end of this week, I suggest we merge it. As this is a feature for 202211 we need to close the loop asap.

[Yarden-Z]

@xumia Is there any update on this HLD review?

[liat-grozovik]

@abdosi , @lguohan , @xumia can we please close the HLD review feedback and merge?