Add RunningDeploymentSource and TargetDeploymentSource to ExecuteStageRequest

[Warashi]

What this PR does:

as title

Why we need it:

We need these to execute deployment stages such as K8S_SYNC and K8S_ROLLBACK.

Which issue(s) this PR fixes:

Part of #5530

Does this PR introduce a user-facing change?: No

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 26.51%. Comparing base (855aa0a) to head (558a53f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5606   +/-   ##
=======================================
  Coverage   26.51%   26.51%           
=======================================
  Files         474      474           
  Lines       50496    50505    +9     
=======================================
+ Hits        13388    13393    +5     
- Misses      36047    36048    +1     
- Partials     1061     1064    +3     

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[ffjlabo]

LGTM