Fix PyTorch repeat axis handling

[FlorianPfaff]

Fixes the PyTorch backend repeat wrapper so backend.repeat accepts axis-style calls. Testing was not run in this connector session.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	74.22s
✅ JSON	prettier	7	0	0	0	1.04s
✅ JSON	v8r	7		0	0	4.55s
✅ MARKDOWN	markdownlint	68	0	0	0	1.74s
✅ MARKDOWN	markdown-table-formatter	68	0	0	0	0.94s
✅ PYTHON	black	1094	1	0	0	62.63s
✅ PYTHON	isort	1094	1	0	0	4.75s
✅ REPOSITORY	checkov	yes		no	no	48.83s
✅ REPOSITORY	gitleaks	yes		no	no	9.76s
✅ REPOSITORY	git_diff	yes		no	no	0.19s
✅ REPOSITORY	secretlint	yes		no	no	33.65s
✅ REPOSITORY	syft	yes		no	no	5.36s
✅ REPOSITORY	trivy-sbom	yes		no	no	12.36s
✅ REPOSITORY	trufflehog	yes		no	no	21.27s
✅ YAML	prettier	11	0	0	0	0.77s
✅ YAML	v8r	11		0	0	10.71s
✅ YAML	yamllint	11		0	0	0.56s

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