Use homestore 6.x

[hkadayam]

This PR provides features

• To use homestore 6.x which supports vetoing the shard create or blob put when PG or shard is not ready respectively.

• HomeObject Metrics and also durable entities to ensure that blob_id, count etc are all made durable and loaded after restart

• Start HttpServer and provide metrics, objlife counter, settings related endpoints

[yamingk]

LGTM

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.20197% with 95 lines in your changes are missing coverage. Please review.

Project coverage is 69.51%. Comparing base (0f1b2ff) to head (5a1f9e2).

Files	Patch %	Lines
src/lib/homestore_backend/hs_http_manager.cpp	22.82%	71 Missing :warning:
src/lib/homestore_backend/hs_blob_manager.cpp	59.37%	9 Missing and 4 partials :warning:
src/lib/homestore_backend/hs_homeobject.hpp	76.19%	5 Missing :warning:
...ib/homestore_backend/replication_state_machine.cpp	57.14%	2 Missing and 1 partial :warning:
src/lib/homeobject_impl.hpp	75.00%	0 Missing and 1 partial :warning:
src/lib/homestore_backend/hs_cp_callbacks.cpp	94.11%	1 Missing :warning:
src/lib/homestore_backend/index_kv.cpp	66.66%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #159 +/- ## ========================================== - Coverage 72.40% 69.51% -2.89% ========================================== Files 30 30 Lines 1377 1473 +96 Branches 137 148 +11 ========================================== + Hits 997 1024 +27 - Misses 300 369 +69 Partials 80 80 ```

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