Introduce a memory leak to check the k6 tests - follow up on #5213

[obulat]

Fixes

Related to #5179 by @obulat

Description

Between the versions of 2.1.7 and 2.2.5, Pinia has fixed the problem that was causing a memory leak when initializing a store from an existing object (probably in fix: reference the store directly in storeToRefs to ensure correct reactivity after HMR). This means that #5179 alone is not enough to introduce a memory leak, we need to downgrade pinia as well.

Testing Instructions

This change will only be used to test k6 in staging, and will be reversed later.

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[github-actions]

Latest k6 run output¹

     ✓ status was 200

     checks.........................: 100.00% ✓ 6400      ✗ 0   
     data_received..................: 1.5 GB  7.1 MB/s
     data_sent......................: 837 kB  4.0 kB/s
     http_req_blocked...............: avg=14.12µs  min=2.04µs   med=4.45µs   max=7.18ms  p(90)=5.88µs   p(95)=6.32µs  
     http_req_connecting............: avg=9.32µs   min=0s       med=0s       max=7.12ms  p(90)=0s       p(95)=0s      
     http_req_duration..............: avg=727.37ms min=44.98ms  med=639.87ms max=2.85s   p(90)=1.29s    p(95)=1.4s    
       { expected_response:true }...: avg=727.37ms min=44.98ms  med=639.87ms max=2.85s   p(90)=1.29s    p(95)=1.4s    
   ✓ http_req_failed................: 0.00%   ✓ 0         ✗ 6400
     http_req_receiving.............: avg=151.51µs min=44.53µs  med=125.01µs max=19.21ms p(90)=194.65µs p(95)=233.44µs
     http_req_sending...............: avg=23.31µs  min=5.92µs   med=20.3µs   max=4.71ms  p(90)=26.21µs  p(95)=28.01µs 
     http_req_tls_handshaking.......: avg=0s       min=0s       med=0s       max=0s      p(90)=0s       p(95)=0s      
     http_req_waiting...............: avg=727.19ms min=44.83ms  med=639.71ms max=2.85s   p(90)=1.29s    p(95)=1.4s    
     http_reqs......................: 6400    30.227723/s
     iteration_duration.............: avg=3.88s    min=821.35ms med=3.24s    max=10.31s  p(90)=7.44s    p(95)=7.91s   
     iterations.....................: 1200    5.667698/s
     vus............................: 8       min=8       max=30
     vus_max........................: 30      min=30      max=30

Footnotes

1. This comment will automatically update with new output each time k6 runs for this PR ↩