refactor: Make Examples binaries optional

[benjaminhuth]

This adds the CMake option ACTS_BUILD_EXAMPLES_BINARIES that is OFF by default.

Also adds a bit of logic so that Boost::progarm_options and Boost::unit_test_framework are only imported if they are required. This way, a Acts build without tests, binaries or analysis scripts does only require boost headers.

This has also some impact on build times, I save ~6 minutes for make -j1...

[github-actions]

📊 Physics performance monitoring for c8c6ac3

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

[codecov]

Codecov Report

Merging #1754 (985bb3b) into main (d1ce5a5) will not change coverage.
The diff coverage is n/a.

❗ Current head 985bb3b differs from pull request most recent head c8c6ac3. Consider uploading reports for the commit c8c6ac3 to get more accurate results

@@           Coverage Diff           @@
##             main    #1754   +/-   ##
=======================================
  Coverage   49.80%   49.80%           
=======================================
  Files         406      406           
  Lines       22565    22565           
  Branches    10305    10305           
=======================================
  Hits        11239    11239           
  Misses       4138     4138           
  Partials     7188     7188           

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[andiwand]

lets get this in