introduce max concurrent streams for stream manager

[TingDaoK]

Issue #, if available:

• allow stream manager to config max number of streams to be active at the same time.

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.72%. Comparing base (0d8e1a9) to head (6da4fa3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #553      +/-   ##
==========================================
- Coverage   79.76%   79.72%   -0.05%     
==========================================
  Files          28       28              
  Lines       11893    11901       +8     
==========================================
+ Hits         9487     9488       +1     
- Misses       2406     2413       +7     

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