[Manual] backport to 1.21-rc1 (#22210)

* Backport of Initialise release for consul 1.21 into release/1.21.x (#22196)

* backport of commit 300c0807

* backport of commit 1a36b65b

* backport of commit db38bbc4



---------

Co-authored-by: Abhishek <abhishek.sahu@hashicorp.com>

* Backport of Upgrade go version to 1.23 into release/1.21.x (#22206)

* backport of commit bfc7c302

* backport of commit 7efe3532

* backport of commit e866490d

* backport of commit 8ed8c433

* backport of commit a400badc



---------

Co-authored-by: Abhishek <abhishek.sahu@hashicorp.com>

* Backport of security: Upgrade crypto, oauth, go-jose into release/1.21.x (#22209)

* backport of commit 637e628a

* backport of commit 9917927f

* backport of commit 1315d04c

* backport of commit 1ee57c77



---------

Co-authored-by: Abhishek <abhishek.sahu@hashicorp.com>

---------

Co-authored-by: hc-github-team-consul-core <github-team-consul-core@hashicorp.com>