enhance: [2.4] update the expr version and format the expr http response

[SimFG]

/kind improvement

• pr: enhance: update the expr version and format the expr http response #36406

[codecov]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.10%. Comparing base (b92daa1) to head (469b20d).
Report is 7 commits behind head on 2.4.

Files with missing lines	Patch %	Lines
internal/util/flowgraph/node.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              2.4   #36467      +/-   ##
==========================================
- Coverage   81.15%   81.10%   -0.06%     
==========================================
  Files        1060     1060              
  Lines      139759   139762       +3     
==========================================
- Hits       113427   113351      -76     
- Misses      22061    22119      +58     
- Partials     4271     4292      +21     

Files with missing lines	Coverage Δ
internal/http/server.go	65.51% <100.00%> (+1.23%)	⬆️
internal/util/flowgraph/node.go	84.15% <0.00%> (ø)

... and 30 files with indirect coverage changes

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, SimFG

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