feat(instance): add support for all server actions and snapshot operations

[Mia-Cross]

This PR adds the following features:

• State actions: poweron, stop_in_place, poweroff, terminate, reboot
• Create a snapshot
• Export a snapshot to S3
• Backup

Closes #3333

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 355 lines in your changes missing coverage. Please review.
✅ Project coverage is 1.67%. Comparing base (53d2805) to head (530e52f).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...ternal/services/instance/action_create_snapshot.go	0.00%	143 Missing ⚠️
...ternal/services/instance/action_export_snapshot.go	0.00%	127 Missing ⚠️
internal/services/instance/testfuncs/checks.go	0.00%	44 Missing ⚠️
internal/services/instance/action_server_action.go	0.00%	35 Missing ⚠️
provider/framework.go	0.00%	4 Missing ⚠️
internal/services/instance/helpers_instance.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3520      +/-   ##
=========================================
- Coverage    1.67%   1.67%   -0.01%     
=========================================
  Files         428     430       +2     
  Lines       46748   47086     +338     
=========================================
+ Hits          785     787       +2     
- Misses      45875   46212     +337     
+ Partials       88      87       -1     

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