[YUNIKORN-1902] remove Application CRD

[FrankYang0529]

What is this PR for?

Remove Application CRD and clean up the build.

What type of PR is it?

• - Bug Fix
• - Improvement
• - Feature
• - Documentation
• - Hot Fix
• - Refactoring

Todos

• - Task

What is the Jira issue?

https://issues.apache.org/jira/browse/YUNIKORN-1902

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 #650 (f746a60) into master (4cfbda0) will increase coverage by 0.14%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #650      +/-   ##
==========================================
+ Coverage   71.19%   71.33%   +0.14%     
==========================================
  Files          52       51       -1     
  Lines        8276     8104     -172     
==========================================
- Hits         5892     5781     -111     
+ Misses       2180     2127      -53     
+ Partials      204      196       -8     

Files Changed	Coverage Δ
pkg/appmgmt/interfaces/amprotocol.go	0.00% <ø> (ø)
pkg/dispatcher/dispatcher.go	77.30% <ø> (+2.47%)	⬆️
pkg/shim/scheduler.go	74.19% <ø> (-0.12%)	⬇️
pkg/appmgmt/appmgmt.go	57.81% <100.00%> (+8.46%)	⬆️
pkg/appmgmt/general/metadata.go	86.07% <100.00%> (ø)
pkg/cache/application.go	74.69% <100.00%> (-0.47%)	⬇️
pkg/cache/placeholder.go	92.85% <100.00%> (ø)
pkg/common/utils/gang_utils.go	89.09% <100.00%> (ø)
pkg/common/utils/utils.go	71.57% <100.00%> (ø)

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[craigcondit]

+1 LGTM.