fix: trim "v" prefix for ubi backend tools

[jdx]

before:

❯ mise ls-remote ubi:jdx/usage
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.1.16
v0.1.17
v0.1.18
v0.2.0
v0.2.1
v0.3.0
v0.3.1
v0.4.0
v0.5.0
v0.5.1
v0.6.0
v0.7.0
v0.7.1
v0.7.2
v0.7.3
v0.7.4
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.9.0
v0.10.0
v0.11.0

to make things simpler for the user, we avoid "v" prefixes whenever possible so users don't need to remember which tools have the prefix and which don't

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ -0.17%	✅ 44.35%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (c412b32)	19454	14975	76.98%
Head commit (a64d941)	19397 (-57)	14899 (-76)	76.81% (-0.17%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#2765)	239	106	44.35%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[github-actions]

Package	Line Rate	Complexity	Health
src.backend	59%	0	➖
src	82%	0	✔
src.cli	78%	0	✔
src.cli.alias	89%	0	✔
src.cli.args	97%	0	✔
src.cli.backends	95%	0	✔
src.cli.cache	87%	0	✔
src.cli.config	91%	0	✔
src.cli.direnv	80%	0	✔
src.cli.generate	72%	0	➖
src.cli.plugins	84%	0	✔
src.cli.settings	93%	0	✔
src.cli.sync	56%	0	➖
src.cli.tasks	75%	0	✔
src.config.config_file	83%	0	✔
src.config	85%	0	✔
src.plugins	67%	0	➖
src.plugins.core	53%	0	➖
src.shell	98%	0	✔
src.task	92%	0	✔
src.toolset	83%	0	✔
src.ui	69%	0	➖
Summary	77% (14899 / 19397)	0	✔