fix(action-strip): Assign parent to not destroy on DOM move.

[MayaKirova]

Closes #15768
Closes #15911

Additional information (check all that apply):

• Bug fix
• New functionality
• Documentation
• Demos
• CI/CD

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them

[MayaKirova]

Note to self - check why hide check of strip fails:

 public hide(): void {
        this.hidden = true;
        this.closeMenu();
        if (this._originalParent) {
            // D.P. fix(elements) don't detach native DOM, instead move back. Might not matter for Angular, but Elements will destroy
            this.renderer.appendChild(this._originalParent, this._viewContainer.element.nativeElement);
        } else if (this.context && this.context.element) {
            this.renderer.removeChild(this.context.element.nativeElement, this._viewContainer.element.nativeElement);
        }
    }

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[ChronosSF]

20.0.x received its last patch and will no longer be supported.