expose stage info created by buildpipeline phase to executestage phase. add null check for getDeploymentPluginMetadata

[hiep-tk]

What this PR does: as title

Why we need it: currently the script_run stages need more context to publish their stage already run status to the script_run_rollback so multiple rollbacks can be differentiated and selectively run

Which issue(s) this PR fixes: Part of #5901

Fixes #

Does this PR introduce a user-facing change?:

• How are users affected by this change:
• Is this breaking change:
• How to migrate (if breaking change):

[t-kikuc]

Please describe your design on the issue in advance and submit the next draft PR because I cannot imagine what you are going to do.

[t-kikuc]

Please split the PR since this does not seem to be directly related to SCRIPT_RUN.

And please make consistent with other GetXxxMetadata() funcs.

[hiep-tk]

currently this getxxxMetadata function's error checking is missing, which would cause nil pointer deref panic when the grpc call response with error. About the return signature of this format, it currently only extracts value property and not the found one, which would make it hard to differentiate, for example when the metadata is stored with empty value. Do you think the signature should stay as before, or as updated? @t-kikuc

[codecov]

Codecov Report

Attention: Patch coverage is 32.75862% with 117 lines in your changes missing coverage. Please review.

Project coverage is 54.90%. Comparing base (b7555ad) to head (f9530e1).
Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/app/pipedv1/plugin/scriptrun/plugin.go	32.88%	97 Missing and 3 partials ⚠️
pkg/app/pipedv1/plugin/scriptrun/options.go	43.75%	6 Missing and 3 partials ⚠️
pkg/app/pipedv1/plugin/scriptrun/main.go	0.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #5910       +/-   ##
===========================================
+ Coverage   28.23%   54.90%   +26.67%     
===========================================
  Files         512       90      -422     
  Lines       55326     8771    -46555     
===========================================
- Hits        15620     4816    -10804     
+ Misses      38461     3625    -34836     
+ Partials     1245      330      -915     

Flag	Coverage Δ
.	?
.-pkg-app-pipedv1-plugin-kubernetes	66.42% <ø> (ø)
.-pkg-app-pipedv1-plugin-kubernetes_multicluster	67.51% <ø> (ø)
.-pkg-app-pipedv1-plugin-scriptrun	32.36% <32.36%> (?)
.-pkg-app-pipedv1-plugin-wait	35.51% <ø> (ø)
.-pkg-plugin-sdk	50.92% <100.00%> (+0.02%)	⬆️
.-tool-actions-gh-release	19.23% <ø> (ø)
.-tool-actions-plan-preview	25.30% <ø> (?)
.-tool-codegen-protoc-gen-auth	0.00% <ø> (?)

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[t-kikuc]

@hiep-tk
Let's restart as a new PR!