stat: Fix to use atomic operations

[bitboom]

This PR aims to eliminate unsafe code associated with Mutable Static Variables (MSVs).

• I have investigated 10 variables used as MSV.
  • VMID_SET, RMM_PAGE_TABLE, LOGGER, COLLECTED_STAT_CNT, STATS
  • RMM_SHARED_BUFFER_LOCK, REALM_ATTEST_KEY, PLAT_TOKEN, GRANULE_STATUS_TABLE, STDOUT
• All accesses to MSVs have been made safe with this PR

The strategy for accessing MSVs is outlined below.

1. Immutable Variables: Directly declare static variables for immutable data, requiring no synchronization.
2. Primitive Types: Use core::sync::atomic for primitive types, enabling atomic operations that ensure thread safety.
3. Dynamic Initialized Types: Implement lazy_static for types requiring runtime initialization, ensuring thread-safe setup.
4. Synchronization Mechanisms: Choose between SpinLock and Mutex based on your system requirements

[bitboom]

Replaced with https://github.com/islet-project/islet/pull/314