feat: add data-plane-instance heartbeat

[ndr-brt]

What this PR changes/adds

Adds a DataPlaneSelectorManager that takes care of checking the dataplanes availability.

BREAKING CHANGE: there's a new lease_id column added to the edc_data_plane_instance table, please check the diff for details.

Why it does that

Avoid failing transfers for unavabilable data planes.

Further notes

• note that data-plane-self-registration still "deletes" itself instead of "unregistering". It will fixed in a subsequent pr

Linked Issue(s)

Closes #4220

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 72.39819% with 61 lines in your changes are missing coverage. Please review.

Project coverage is 75.28%. Comparing base (7f20ba5) to head (3c901cc).
Report is 287 commits behind head on main.

Files	Patch %	Lines
...dataplane/selector/DataPlaneSelectorExtension.java	0.00%	20 Missing ⚠️
...selector/spi/instance/DataPlaneInstanceStates.java	0.00%	10 Missing ⚠️
.../selector/store/sql/SqlDataPlaneInstanceStore.java	82.50%	6 Missing and 1 partial ⚠️
...plane/selector/spi/instance/DataPlaneInstance.java	79.41%	7 Missing ⚠️
...ane/selector/spi/store/DataPlaneInstanceStore.java	0.00%	4 Missing ⚠️
...selector/manager/DataPlaneSelectorManagerImpl.java	90.62%	3 Missing ⚠️
...tor/dataplane/client/DataPlaneSignalingClient.java	90.90%	1 Missing and 1 partial ⚠️
...c/connector/core/CoreDefaultServicesExtension.java	0.00%	1 Missing ⚠️
...nsfer/TransferProcessDefaultServicesExtension.java	0.00%	1 Missing ⚠️
...tor/DataPlaneSelectorDefaultServicesExtension.java	0.00%	1 Missing ⚠️
... and 5 more

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4230      +/-   ##
==========================================
+ Coverage   71.74%   75.28%   +3.53%     
==========================================
  Files         919     1040     +121     
  Lines       18457    20755    +2298     
  Branches     1037     1155     +118     
==========================================
+ Hits        13242    15625    +2383     
+ Misses       4756     4619     -137     
- Partials      459      511      +52     

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