fix(cli): mode deprecation with explicit spa or universal flag

[clarkdo]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)

Description

Fix #8133
Fix #8044 (comment)

Assign ssr instead of mode when using --spa or --universal flag in cli

Checklist:

• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-commenter]

Codecov Report

Merging #8134 into dev will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev    #8134      +/-   ##
==========================================
+ Coverage   68.91%   68.93%   +0.01%     
==========================================
  Files          91       91              
  Lines        3851     3853       +2     
  Branches     1048     1049       +1     
==========================================
+ Hits         2654     2656       +2     
  Misses        972      972              
  Partials      225      225              

Flag	Coverage Δ
#unittests	68.93% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
packages/cli/src/utils/config.js	100.00% <100.00%> (ø)

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