Add handling of firmware upgrades for nxos

[IvoGoman]

- adds new DeviceMaintenance key "firmware-upgrade"
- pauses reconciliation while upgrade is running
- adds DeviceMaintenanceFirmwareTargetAnnotation to specify the target firmware version

nxos provider impletementation
- ensure enough space, extends NX-API timeout during upgrade.
- image is copied & verified.
- show incompatibility-all nxos & show install all impact nxos are run to check software & hw
- after install & reload the device is checked for version. When boot image matches the target image the upgrade is considered done.

[github-actions]

Merging this branch changes the coverage (2 decrease, 1 increase)

Impacted Packages	Coverage Δ	🤖
github.com/ironcore-dev/network-operator/api/core/v1alpha1	2.67% (ø)
github.com/ironcore-dev/network-operator/internal/controller/core	61.14% (-0.44%)	👎
github.com/ironcore-dev/network-operator/internal/paused	0.00% (ø)
github.com/ironcore-dev/network-operator/internal/provider	0.00% (ø)
github.com/ironcore-dev/network-operator/internal/provider/cisco/nxos	13.34% (+3.55%)	👍
github.com/ironcore-dev/network-operator/internal/transport/nxapi	68.97% (-4.43%)	👎

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Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/ironcore-dev/network-operator/api/core/v1alpha1/groupversion_info.go	0.00% (ø)	2	0	2
github.com/ironcore-dev/network-operator/internal/controller/core/device_controller.go	57.67% (-9.47%)	326 (+46)	188	138 (+46)	👎
github.com/ironcore-dev/network-operator/internal/paused/paused.go	0.00% (ø)	58 (+5)	0	58 (+5)
github.com/ironcore-dev/network-operator/internal/provider/cisco/nxos/firmware.go	76.39% (+76.39%)	144 (+144)	110 (+110)	34 (+34)	🌟
github.com/ironcore-dev/network-operator/internal/provider/cisco/nxos/system.go	3.23% (-0.11%)	31 (+1)	1	30 (+1)	👎
github.com/ironcore-dev/network-operator/internal/provider/provider.go	0.00% (ø)	42	0	42
github.com/ironcore-dev/network-operator/internal/transport/nxapi/nxapi.go	68.70% (-4.45%)	115 (+7)	79	36 (+7)	👎

Please note that the "Total", "Covered", and "Missed" counts above refer to code statements instead of lines of code. The value in brackets refers to the test coverage of that file in the old version of the code.

Changed unit test files

• github.com/ironcore-dev/network-operator/internal/controller/core/suite_test.go
• github.com/ironcore-dev/network-operator/internal/provider/cisco/nxos/firmware_test.go