merge_pr_62823

Adopt docshell ID and remove child if parent SH entry expired.

Differential Revision: https://phabricator.services.mozilla.com/D323223

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=2037346
gecko-commit: c25cc17e923c247eb42afed724098ec9c3764ac5
gecko-commit-git: 00b80abff95cc5a24433f20af6e5e9cd40a26de6
gecko-reviewers: dom-core-reviewers, smaug