🐛 [RUMF-1122] fix view updates while session is expired

[bcaudan]

Motivation

Bump in session time spent matching the deployment of #1187.
Suspected root cause: regression allowing views to send updates while the session is expired

Changes

For view updates, check if the session is currently tracked instead of if the session was tracked at the beginning of the view.

Testing

• Local
• Staging
• Unit
• End to end

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I have gone over the contributing documentation.

[codecov-commenter]

Codecov Report

Merging #1228 (4d1b784) into main (433202e) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1228      +/-   ##
==========================================
- Coverage   89.01%   88.99%   -0.03%     
==========================================
  Files         101      101              
  Lines        4324     4324              
  Branches      988      989       +1     
==========================================
- Hits         3849     3848       -1     
- Misses        475      476       +1     

Impacted Files	Coverage Δ
packages/rum-core/src/domain/assembly.ts	100.00% <100.00%> (ø)
packages/core/src/tools/timeUtils.ts	97.14% <0.00%> (-2.86%)	⬇️

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