refactor: SourceLink uses custom Acts::Any

[paulgessinger]

This should be a transparent change in terms of the interface.

[codecov]

Codecov Report

Merging #1740 (6f3ec27) into main (4e60261) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1740   +/-   ##
=======================================
  Coverage   49.20%   49.20%           
=======================================
  Files         398      398           
  Lines       21847    21850    +3     
  Branches     9913     9914    +1     
=======================================
+ Hits        10750    10752    +2     
  Misses       4222     4222           
- Partials     6875     6876    +1     

Impacted Files	Coverage Δ
Core/include/Acts/EventData/SourceLink.hpp	84.61% <100.00%> (+9.61%)	⬆️
Core/include/Acts/Utilities/Any.hpp	72.72% <0.00%> (-0.76%)	⬇️

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[github-actions]

📊 Physics performance monitoring for 6f3ec27

Full report
Seeding: seeded, truth estimated, orthogonal
CKF: seeded, truth smeared, truth estimated, orthogonal
IVF: seeded, truth smeared, truth estimated, orthogonal
Ambiguity resolution: seeded, orthogonal
Truth tracking
Truth tracking (GSF)

Vertexing

Vertexing vs. mu

IVF seeded

IVF truth_smeared

IVF truth_estimated

IVF orthogonal

Seeding

Seeding seeded

Seeding truth_estimated

Seeding orthogonal

CKF

CKF seeded

CKF truth_smeared

CKF truth_estimated

CKF orthogonal

Ambiguity resolution

seeded

Truth tracking (Kalman Filter)

Truth tracking

Truth tracking (GSF)

Truth tracking