Storable API Refactoring

[Coduz]

This PR refactors the Storable API and its base implementation.

Currently all Storable API (used for Elasticsearch enabled services) are contained into kapua-datastore-api and kapua-datastore-internal which make reuse of them not clean since you have to depend on datastore modules instead of common modules.

Related Issue
None

Description of the solution adopted
Moved Storable API clases to kapua-service-api module.
Moved Storable base implementation classes to a new module kapua-service-storable

Improved the implementation with some goodies added to the KapuaEntity-enabled classes but were not ported to the Storable API.
Examples:

• ListResult.getFirstItem()
• Query as predicateFactory

Screenshots
None

Any side note on the changes made
Improved also the Exception modeling of the Datastore services

[codecov]

Codecov Report

Merging #3073 into develop will increase coverage by 0.01%.
The diff coverage is 71.32%.

@@              Coverage Diff              @@
##             develop    #3073      +/-   ##
=============================================
+ Coverage      62.87%   62.89%   +0.01%     
+ Complexity      2636     2576      -60     
=============================================
  Files           1116     1107       -9     
  Lines          23343    23072     -271     
  Branches        2008     1986      -22     
=============================================
- Hits           14677    14511     -166     
+ Misses          7742     7653      -89     
+ Partials         924      908      -16     

Impacted Files	Coverage Δ	Complexity Δ
.../main/java/org/eclipse/kapua/model/id/KapuaId.java	50.00% <ø> (ø)	0.00 <0.00> (ø)
.../java/org/eclipse/kapua/model/query/SortOrder.java	100.00% <ø> (ø)	0.00 <0.00> (ø)
...search/client/exception/QueryMappingException.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...client/transport/TransportElasticsearchClient.java	1.61% <0.00%> (ø)	0.00 <0.00> (ø)
.../datastore/internal/mediator/ChannelInfoField.java	80.95% <ø> (ø)	6.00 <0.00> (ø)
...e/datastore/internal/mediator/ClientInfoField.java	100.00% <ø> (ø)	6.00 <0.00> (ø)
...e/internal/mediator/MessageStoreConfiguration.java	46.80% <ø> (ø)	8.00 <0.00> (ø)
...tastore/internal/model/ChannelInfoCreatorImpl.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...atastore/internal/model/ClientInfoCreatorImpl.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...datastore/internal/model/DatastoreMessageImpl.java	100.00% <ø> (ø)	5.00 <0.00> (ø)
... and 72 more