feat: set test clients and embedded node to use non-zero shard/realm

[vtronkov]

Description:
Make the test client and the embedded node easily configurable with non-zero shard/realm

Related issue(s):

Fixes #17604

Notes for reviewer:

• Change the spec-default.properties to only point to account/file numbers without the shard/realm
• Change the HapiPropertySource.java to append the shard/realm that is read from the configuration
• Change the embedded node to set the shard/realm reading it from the configuration

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.00% (target: -1.00%)	✅ ∅

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (a45666e)	98558	71826	72.88%
Head commit (1b49a62)	98558 (+0)	71826 (+0)	72.88% (+0.00%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#17601)	0	0	∅ (not applicable)

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 68.92%. Comparing base (a45666e) to head (1b49a62).

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #17601   +/-   ##
=========================================
  Coverage     68.92%   68.92%           
  Complexity    22850    22850           
=========================================
  Files          2630     2630           
  Lines         98775    98775           
  Branches      10256    10256           
=========================================
  Hits          68084    68084           
  Misses        26797    26797           
  Partials       3894     3894           

[kimbor]

lgtm!

[iwsimon]

LGTM, thanks @vtronkov

[lukelee-sl]

LGTM.