Remove Secure Backup, Cross-signing and Cryptography sections in Security & Privacy user settings (#29088)

* feat(security tab)!: remove secure backup panel

BREAKING CHANGE: the key storage user interaction are moved into the Encryption tab. The debugging information are moved into the devtools.

* feat(security tab)!: remove cross signing section

BREAKING CHANGE: the cryptographic identity can be reseted in the Encryption tab. The debugging information are moved into the devtools

* feat(security tab)!: remove cryptography section

BREAKING CHANGE: this section can be found in the Advanced section of the encryption tab.

* test(security tab): update snapshot

* chore(security tab): remove unused component and function

* chore(security tab): update i18n

* test(e2e): remove `backups.spec.ts`

src/components/views/dialogs/security/ConfirmDestroyCrossSigningDialog.tsx

@@ -1,49 +0,0 @@
-/*
-Copyright 2024 New Vector Ltd.
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE files in the repository root for full details.
-*/
-
-import React from "react";
-
-import { _t } from "../../../../languageHandler";
-import BaseDialog from "../BaseDialog";
-import DialogButtons from "../../elements/DialogButtons";
-
-interface IProps {
-    onFinished: (success?: boolean) => void;
-}
-
-export default class ConfirmDestroyCrossSigningDialog extends React.Component<IProps> {
-    private onConfirm = (): void => {
-        this.props.onFinished(true);
-    };
-
-    private onDecline = (): void => {
-        this.props.onFinished(false);
-    };
-
-    public render(): React.ReactNode {
-        return (
-            <BaseDialog
-                className="mx_ConfirmDestroyCrossSigningDialog"
-                hasCancel={true}
-                onFinished={this.props.onFinished}
-                title={_t("encryption|destroy_cross_signing_dialog|title")}
-            >
-                <div className="mx_ConfirmDestroyCrossSigningDialog_content">
-                    <p>{_t("encryption|destroy_cross_signing_dialog|warning")}</p>
-                </div>
-                <DialogButtons
-                    primaryButton={_t("encryption|destroy_cross_signing_dialog|primary_button_text")}
-                    onPrimaryButtonClick={this.onConfirm}
-                    primaryButtonClass="danger"
-                    cancelButton={_t("action|cancel")}
-                    onCancel={this.onDecline}
-                />
-            </BaseDialog>
-        );
-    }
-}