Reduce Memory Allocations in LongDateLayoutRenderer

[epignosisx]

Removes a memory allocation inside StringBuilder when doing number.ToString() we can simply reuse existing method to remove allocation.

[codecov-io]

Current coverage is 73.33%

Merging #1139 into master will increase coverage by +0.01% as of 9ac9cbc

@@            master   #1139   diff @@
======================================
  Files          264     264       
  Stmts        14944   14944       
  Branches      1636    1636       
  Methods          0       0       
======================================
+ Hit          10958   10959     +1
+ Partial        417     416     -1
  Missed        3569    3569       

Review entire Coverage Diff as of 9ac9cbc

---

Uncovered Suggestions

1. +0.09% via ...nternal/AspHelper.cs#206...218
2. +0.09% via ...nternal/AspHelper.cs#188...200
3. +0.09% via ...nternal/AspHelper.cs#170...182
4. See 7 more...

Powered by Codecov. Updated on successful CI builds.

[304NotModified]

Thanks!