feat: Specify fraction container index

[itsomri]

Description

This PR allows fraction container name and type to be specified in pod annotations, letting the user set other containers than the first one.

Checklist

Note: Ensure your PR title follows the Conventional Commits format (e.g., feat(scheduler): add new feature)

• Self-reviewed
• Added/updated tests (if needed)
• Updated CHANGELOG.md (if needed)
• Updated documentation (if needed)

[github-actions]

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

Impacted Packages	Coverage Δ	🤖
github.com/NVIDIA/KAI-scheduler/pkg/admission/webhook/v1alpha2/gpusharing	90.00% (+67.78%)	🌟
github.com/NVIDIA/KAI-scheduler/pkg/binder/common	13.98% (-3.59%)	👎
github.com/NVIDIA/KAI-scheduler/pkg/binder/plugins/gpusharing	0.00% (ø)
github.com/NVIDIA/KAI-scheduler/pkg/common/constants	0.00% (ø)

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/NVIDIA/KAI-scheduler/pkg/admission/webhook/v1alpha2/gpusharing/gpu_sharing.go	90.00% (+67.78%)	20 (+2)	18 (+14)	2 (-12)	🌟
github.com/NVIDIA/KAI-scheduler/pkg/binder/common/gpu_access.go	0.00% (ø)	71 (+19)	0	71 (+19)
github.com/NVIDIA/KAI-scheduler/pkg/binder/plugins/gpusharing/gpu_sharing.go	0.00% (ø)	32 (+2)	0	32 (+2)
github.com/NVIDIA/KAI-scheduler/pkg/common/constants/constants.go	0.00% (ø)	2	0	2

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/NVIDIA/KAI-scheduler/pkg/admission/webhook/v1alpha2/gpusharing/gpu_sharing_test.go
• github.com/NVIDIA/KAI-scheduler/pkg/binder/plugins/gpusharing/gpu_sharing_test.go

[github-actions]

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

Impacted Packages	Coverage Δ	🤖
github.com/NVIDIA/KAI-scheduler/pkg/admission/webhook/v1alpha2/gpusharing	90.00% (+67.78%)	🌟
github.com/NVIDIA/KAI-scheduler/pkg/binder/common	13.98% (-3.59%)	👎
github.com/NVIDIA/KAI-scheduler/pkg/binder/plugins/gpusharing	0.00% (ø)
github.com/NVIDIA/KAI-scheduler/pkg/common/constants	0.00% (ø)

---

Coverage by file

Changed files (no unit tests)

Changed File	Coverage Δ	Total	Covered	Missed	🤖
github.com/NVIDIA/KAI-scheduler/pkg/admission/webhook/v1alpha2/gpusharing/gpu_sharing.go	90.00% (+67.78%)	20 (+2)	18 (+14)	2 (-12)	🌟
github.com/NVIDIA/KAI-scheduler/pkg/binder/common/gpu_access.go	0.00% (ø)	71 (+19)	0	71 (+19)
github.com/NVIDIA/KAI-scheduler/pkg/binder/plugins/gpusharing/gpu_sharing.go	0.00% (ø)	32 (+2)	0	32 (+2)
github.com/NVIDIA/KAI-scheduler/pkg/common/constants/constants.go	0.00% (ø)	2	0	2

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/NVIDIA/KAI-scheduler/pkg/admission/webhook/v1alpha2/gpusharing/gpu_sharing_test.go
• github.com/NVIDIA/KAI-scheduler/pkg/binder/plugins/gpusharing/gpu_sharing_test.go