[28.x backport] refactor(cli/compose/loader): extract ParseVolume() to its own package

[thaJeztah]

• backport refactor(cli/compose/loader): extract ParseVolume() to its own package #6202
• fixes cli/command/container: remove dependency on cli/compose/loader.ParseVolume #6188

Moves ParseVolume() to a new internal package to remove the dependency on cli/compose/loader in cli/command/container/opts.go

refactor to keep types isolated

• rename the package to "volumespec" to reuse the name of the package as part of the name (parsevolume.ParseVolume() -> volumespec.Parse())
• move the related compose types to the internal package as well, and rename them to be more generic (not associated with "compose");
  • ServiceVolumeConfig -> VolumeConfig
  • ServiceVolumeBind -> BindOpts
  • ServiceVolumeVolume -> VolumeOpts
  • ServiceVolumeImage -> ImageOpts
  • ServiceVolumeTmpfs -> TmpFsOpts
  • ServiceVolumeCluster -> ClusterOpts
• alias the internal types inside cli/compose/types to keep backward compatibility (for any external consumers); even though the implementation is internal, Go allows aliasing types to use them externally.

(cherry picked from commit ef7fd8b)

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.00000% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
cli/compose/loader/loader.go	33.33%	2 Missing ⚠️

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