feat(experiment): Added DryRun analysis mode functionality for experiments

[agrawroh]

Description

Thins PR extends the dryRun functionality to the experiments.
https://argoproj.github.io/argo-rollouts/features/analysis/#dry-run-mode

Checklist

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

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Signed-off-by: Rohit Agrawal [email protected]

[codecov]

Codecov Report

Merging #1691 (5f83317) into master (4d3b992) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1691      +/-   ##
==========================================
- Coverage   82.07%   82.05%   -0.02%     
==========================================
  Files         116      116              
  Lines       16064    16030      -34     
==========================================
- Hits        13184    13154      -30     
+ Misses       2208     2205       -3     
+ Partials      672      671       -1     

Impacted Files	Coverage Δ
utils/analysis/helpers.go	77.93% <ø> (-0.25%)	⬇️
experiments/experiment.go	89.69% <100.00%> (+0.04%)	⬆️
rollout/trafficrouting/istio/controller.go	50.81% <0.00%> (-1.63%)	⬇️

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
7.1% Duplication

[jessesuen]

LGTM!