[YUNIKORN-1124] Avoid passing empty nodeAttributes in UpdateNode request

[manirajv06]

What is this PR for?

Shim do not pass the following:

1. Empty NodeAttributes map as part of UpdateRequest (for delete, restore & decommissioning actions).
2. Removed OccupiedResource and labels from UpdateRequest (create action) as they are not required on the core side

What type of PR is it?

• - Improvement

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-1124

How should this be tested?

Screenshots (if appropriate)

Questions:

• - The licenses files need update.
• - There is breaking changes for older versions.
• - It needs documentation.

[codecov]

Codecov Report

Merging #390 (27804e5) into master (527f4d1) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #390      +/-   ##
==========================================
- Coverage   65.84%   65.82%   -0.03%     
==========================================
  Files          40       40              
  Lines        6230     6226       -4     
==========================================
- Hits         4102     4098       -4     
  Misses       1973     1973              
  Partials      155      155              

Impacted Files	Coverage Δ
pkg/cache/node.go	90.06% <100.00%> (-0.07%)	⬇️
pkg/common/si_helper.go	99.33% <100.00%> (-0.02%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 527f4d1...27804e5. Read the comment docs.

[wilfred-s]

LGTM

I was not sure about OccupiedResource at first but the node passed in is a "new" node which will not have occupied set ever so it can be removed.