Fix etcd snapshot reconcile for agentless servers

[brandond]

Proposed Changes

Fix etcd snapshot reconcile for agentless servers

Disable cleanup of orphaned snapshots and patching of node annotations if running agentless

Fixes regression in agentless etcd behavior introduced by #8064

Types of Changes

bugfix

Verification

See linked issue

Testing

Linked Issues

• etcd snapshot controller thrashes on etcdsnapshotfile management when server is run with --disable-agent #9774

User-Facing Change

Further Comments

[codecov]

Codecov Report

Attention: Patch coverage is 7.14286% with 13 lines in your changes are missing coverage. Please review.

Project coverage is 46.69%. Comparing base (c47c85e) to head (9513070).
Report is 1 commits behind head on master.

Files	Patch %	Lines
pkg/etcd/snapshot_controller.go	0.00%	11 Missing ⚠️
pkg/etcd/snapshot.go	0.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9809      +/-   ##
==========================================
- Coverage   51.56%   46.69%   -4.87%     
==========================================
  Files         155      155              
  Lines       13597    13611      +14     
==========================================
- Hits         7011     6356     -655     
- Misses       5262     6033     +771     
+ Partials     1324     1222     -102     

Flag	Coverage Δ
e2etests	39.11% <7.14%> (-10.27%)	⬇️
inttests	39.44% <7.14%> (?)
unittests	16.38% <0.00%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.