feat: define runtime id as a configurable setting

[ndr-brt]

What this PR changes/adds

Add a new configuration setting called edc.runtime.id, that will replace edc.connector.name

Why it does that

edc.connector.name was not really used for its purpose, instead of being the name of the connector was used as leaseHolder for sql lease, so I generalized its concept calling it edc.runtime.id because its an Id that represent a specific runtime, that could be used in clustered environments to allow idempotence.
Specifically, it will be used by data-planes for self-registration. (see #4031)

Further notes

• the way the configuration is loaded inside the DefaultServiceContext is not optimal, there could be a dedicated component that could do that (like the ExtensionLoader) so the context could be instantiated with a Config instance passed. This will untangle some knots and will improve testing (issue will come)

Linked Issue(s)

Closes #4156

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 20 lines in your changes are missing coverage. Please review.

Project coverage is 19.07%. Comparing base (7f20ba5) to head (623a396).
Report is 239 commits behind head on main.

Files	Patch %	Lines
...dc/boot/system/DefaultServiceExtensionContext.java	0.00%	11 Missing ⚠️
...saction/atomikos/AtomikosTransactionExtension.java	0.00%	2 Missing ⚠️
...g/eclipse/edc/boot/system/runtime/BaseRuntime.java	0.00%	1 Missing ⚠️
...eclipse/edc/iam/oauth2/Oauth2ServiceExtension.java	0.00%	1 Missing ⚠️
...otiation/SqlContractNegotiationStoreExtension.java	0.00%	1 Missing ⚠️
...nsferprocess/SqlTransferProcessStoreExtension.java	0.00%	1 Missing ⚠️
...ataplane/store/sql/SqlDataPlaneStoreExtension.java	0.00%	1 Missing ⚠️
...itor/store/sql/SqlPolicyMonitorStoreExtension.java	0.00%	1 Missing ⚠️
...clipse/edc/spi/system/ServiceExtensionContext.java	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##             main    #4157       +/-   ##
===========================================
- Coverage   71.74%   19.07%   -52.67%     
===========================================
  Files         919      986       +67     
  Lines       18457    20267     +1810     
  Branches     1037     1144      +107     
===========================================
- Hits        13242     3866     -9376     
- Misses       4756    16288    +11532     
+ Partials      459      113      -346     

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