Merge dashpay#6650: perf: optimize sizeof CBLSLazyWrapper

d70260d perf: optimize sizeof CBLSLazyWrapper (Konstantin Akimov)

Pull request description:

  ## Issue being fixed or feature implemented

  members of `CBLSLazyWrapper` has bad padding

  ## What was done?
  This PR reduces memory consumption for classes CBLSLazySignature and CBLSLazyPublicKey on x86_64

      sizeof(CBLSLazyPublicKey)=344 down to 336
      sizeof(CBLSLazySignature)=536 down to 528

  During full index close to ~1Bln of CBLSLazyPublicKey objects are created and destroyed as members of CDeterministicMNState and CSimplifiedMNListEntry with peak in memory close to ~1Mln

  It gave a bit of RAM saving (roughly 8Mb in peak) and a bit of CPU saving by being more cache friendly.

  CBLSLazySignature is not used as widely as CBLSLazyPublicKey

  ## How Has This Been Tested?
  Performance improvement is unmeasurable small (expected improvement is seconds for full re-index and μseconds per a block)

  ## Breaking Changes
  N/A

  ## Checklist:
  - [x] I have performed a self-review of my own code
  - [ ] I have commented my code, particularly in hard-to-understand areas
  - [ ] I have added or updated relevant unit/integration/functional/e2e tests
  - [ ] I have made corresponding changes to the documentation
  - [x] I have assigned this pull request to a milestone

ACKs for top commit:
  UdjinM6:
    utACK d70260d
  PastaPastaPasta:
    utACK d70260d

Tree-SHA512: a3927f039d15819e01b1a0f760299651ec8336ca7ef288413a459715018407ac313612fd2c3a3ea80c135266af6ffc0784d07cc79a0f33ed532a6e109d368445

Author: PastaPastaPasta

src/bls/bls.h

@@ -391,13 +391,14 @@ class CBLSLazyWrapper
     mutable std::mutex mutex;
 
     mutable std::array<uint8_t, BLSObject::SerSize> vecBytes;
-    // Indicates if the value contained in vecBytes is valid
-    mutable bool bufValid{false};
-    mutable bool bufLegacyScheme{true};
 
     mutable BLSObject obj;
     mutable bool objInitialized{false};
 
+    // Indicates if the value contained in vecBytes is valid
+    mutable bool bufValid{false};
+    mutable bool bufLegacyScheme{true};
+
     mutable uint256 hash;
 
 public: