crypto: Fuse `ReadOnlyAccount` and `Account` ✨ #9402

Job	Run time
Check Formatting	17s
Integration test	3m 26s
🐧 all crates, 🦀 stable	9m 25s
Spell Check with Typos	4s
🐧 all crates, 🦀 beta	9m 22s
Sliding Sync Integration test	3m 18s
🍏 all crates, 🦀 stable	12m 6s
xtask / xtask-🐧	4s
xtask / xtask-🍏	8s
🐧 [m]-examples	1m 35s
🐧 [m]-crypto	4m 18s
🐧 [m], no-encryption	1m 48s
🐧 [m], no-sqlite	2m 5s
🕸️ [m]-qrcode	49s
Run clippy	8m 37s
🐧 [m], no-encryption-and-sqlite	1m 59s
🕸️ [m]-base	1m 7s
🐧 [m], sqlite-cryptostore	2m 25s
🐧 [m], rustls-tls	1m 29s
🐧 [m], markdown	2m 16s
🕸️ [m]-common	1m 0s
🐧 [m], socks	2m 42s
🐧 [m], sso-login	2m 49s
🕸️ [m]-indexeddb, no crypto	1m 32s
🕸️ [m]-indexeddb, with crypto	2m 7s
🕸️ [m], no-default, wasm-flags	1m 47s
🕸️ [m], indexeddb stores	1m 52s
🕸️ [m], indexeddb stores, no crypto	1m 13s
	1h 21m 40s

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