fix: expression object support

[igarashitm]

KaotoIO/camel-component-metadata#13 needs to go in before this one

Fixes: #547
Fixes: #548
Fixes: #554

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
19 Code Smells

No Coverage information
1.1% Duplication

[codecov]

Codecov Report

Merging #565 (0dfef25) into main (0b80f6f) will increase coverage by 0.31%.
The diff coverage is 90.90%.

@@             Coverage Diff              @@
##               main     #565      +/-   ##
============================================
+ Coverage     78.54%   78.85%   +0.31%     
  Complexity      132      132              
============================================
  Files            45       45              
  Lines          2279     2289      +10     
  Branches        345      347       +2     
============================================
+ Hits           1790     1805      +15     
+ Misses          326      322       -4     
+ Partials        163      162       -1     

Impacted Files	Coverage Δ
.../step/parser/kamelet/KameletStepParserService.java	73.07% <ø> (+0.76%)	⬆️
...src/main/java/io/kaoto/backend/KamelPopulator.java	90.34% <83.33%> (+0.15%)	⬆️
...ployment/generator/kamelet/KameletRepresenter.java	85.43% <100.00%> (+0.49%)	⬆️

... and 1 file with indirect coverage changes

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